diff --git a/README.md b/README.md
index 3439c51..7e9ea3b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Somewhere in `html>head`:
 <script src="./game-of-life.umd.js"></script>
 ```
 
-Somewhere in JS code`:
+Somewhere in JS code:
 ```js
 const params = {
     cols: 400, // matrix size: 400x400
@@ -39,7 +39,7 @@ function play() {
 
 function playGame() {
     if (!gameStarted) return;
-    game.calcGeneration();
+    game.liveOut();
     window.requestAnimationFrame(playGame)
 }
 
diff --git a/dist/game-of-life.cjs.js b/dist/game-of-life.cjs.js
index 18de756..27fd6a2 100644
--- a/dist/game-of-life.cjs.js
+++ b/dist/game-of-life.cjs.js
@@ -5,12 +5,21 @@ Object.defineProperty(exports, '__esModule', { value: true });
 var Game = /** @class */ (function () {
     function Game(elementId, options) {
         this.options = options;
-        this.canvas = new Canvas(elementId, this.options);
-        this.matrix = [];
-        this.randomize();
+        this.canvas = new Canvas(elementId, {
+            rows: this.options.rows,
+            cols: this.options.cols,
+            color: this.options.color,
+        });
+        if (this.options.seed) {
+            this.matrix = this.options.seed;
+        }
+        else {
+            this.matrix = [];
+            this.randomize();
+        }
         this.canvas.draw(this.matrix);
     }
-    Game.prototype.calcGeneration = function () {
+    Game.prototype.liveOut = function () {
         var newGeneration = JSON.parse(JSON.stringify(this.matrix));
         for (var i = 0; i < this.options.cols; i++) {
             for (var j = 0; j < this.options.rows; j++) {
@@ -23,13 +32,13 @@ var Game = /** @class */ (function () {
         }
         this.matrix = newGeneration;
         this.canvas.draw(newGeneration);
+        return newGeneration;
     };
     Game.prototype.randomize = function () {
         for (var i = 0; i < this.options.cols; i++) {
             for (var j = 0; j < this.options.rows; j++) {
                 if (!this.matrix[i])
                     this.matrix[i] = Array(this.options.cols);
-                //if (!this.matrix[i][j]) this.matrix[i][j] = 
                 this.matrix[i][j] = Math.random() >= 0.5 ? 1 : 0;
             }
         }
diff --git a/dist/game-of-life.esm.js b/dist/game-of-life.esm.js
index 5a2ab7a..9167940 100644
--- a/dist/game-of-life.esm.js
+++ b/dist/game-of-life.esm.js
@@ -1,12 +1,21 @@
 var Game = /** @class */ (function () {
     function Game(elementId, options) {
         this.options = options;
-        this.canvas = new Canvas(elementId, this.options);
-        this.matrix = [];
-        this.randomize();
+        this.canvas = new Canvas(elementId, {
+            rows: this.options.rows,
+            cols: this.options.cols,
+            color: this.options.color,
+        });
+        if (this.options.seed) {
+            this.matrix = this.options.seed;
+        }
+        else {
+            this.matrix = [];
+            this.randomize();
+        }
         this.canvas.draw(this.matrix);
     }
-    Game.prototype.calcGeneration = function () {
+    Game.prototype.liveOut = function () {
         var newGeneration = JSON.parse(JSON.stringify(this.matrix));
         for (var i = 0; i < this.options.cols; i++) {
             for (var j = 0; j < this.options.rows; j++) {
@@ -19,13 +28,13 @@ var Game = /** @class */ (function () {
         }
         this.matrix = newGeneration;
         this.canvas.draw(newGeneration);
+        return newGeneration;
     };
     Game.prototype.randomize = function () {
         for (var i = 0; i < this.options.cols; i++) {
             for (var j = 0; j < this.options.rows; j++) {
                 if (!this.matrix[i])
                     this.matrix[i] = Array(this.options.cols);
-                //if (!this.matrix[i][j]) this.matrix[i][j] = 
                 this.matrix[i][j] = Math.random() >= 0.5 ? 1 : 0;
             }
         }
diff --git a/dist/game-of-life.umd.js b/dist/game-of-life.umd.js
index 130493d..3587b08 100644
--- a/dist/game-of-life.umd.js
+++ b/dist/game-of-life.umd.js
@@ -1 +1 @@
-!function(t,o){"object"==typeof exports&&"undefined"!=typeof module?o(exports):"function"==typeof define&&define.amd?define(["exports"],o):o((t=t||self).GameOfLife={})}(this,function(t){"use strict";var o=(i.prototype.calcGeneration=function(){for(var t=JSON.parse(JSON.stringify(this.matrix)),o=0;o<this.options.cols;o++)for(var i=0;i<this.options.rows;i++){var s=this.calcNeighbours(o,i);this.matrix[o][i]||3!==s||(t[o][i]=1),this.matrix[o][i]&&(s<2||3<s)&&(t[o][i]=0)}this.matrix=t,this.canvas.draw(t)},i.prototype.randomize=function(){for(var t=0;t<this.options.cols;t++)for(var o=0;o<this.options.rows;o++)this.matrix[t]||(this.matrix[t]=Array(this.options.cols)),this.matrix[t][o]=.5<=Math.random()?1:0},i.prototype.calcNeighbours=function(t,o){function i(t,o){return t<0&&(t=s.options.cols-1),t>=s.options.cols&&(t=0),o<0&&(o=s.options.rows-1),o>=s.options.rows&&(o=0),s.matrix[t][o]}var s=this;return[i(t-1,o-1),i(t,o-1),i(t+1,o-1),i(t-1,o),i(t+1,o),i(t-1,o+1),i(t,o+1),i(t+1,o+1)].reduce(function(t,o){return t+o},0)},i);function i(t,o){this.options=o,this.canvas=new s(t,this.options),this.matrix=[],this.randomize(),this.canvas.draw(this.matrix)}var s=(r.prototype.draw=function(t){if(!this.ctx)throw new Error("Can't get 2d context of canvas");var o=parseInt(this.canvas.getAttribute("width")||"100",10),i=parseInt(this.canvas.getAttribute("height")||"100",10);this.ctx.clearRect(0,0,o,i);var s=o/this.options.cols,r=i/this.options.rows;this.ctx.strokeStyle=this.ctx.fillStyle=this.options.color?this.options.color:"#d0b3d1";for(var n=0;n<this.options.cols;n++)for(var e=0;e<this.options.rows;e++)t[n][e]&&this.ctx.fillRect(n*s,e*r,s,r)},r);function r(t,o){this.canvas=document.getElementById(t),this.options=o,this.ctx=this.canvas.getContext("2d")}t.Game=o,Object.defineProperty(t,"__esModule",{value:!0})});
+!function(t,o){"object"==typeof exports&&"undefined"!=typeof module?o(exports):"function"==typeof define&&define.amd?define(["exports"],o):o((t=t||self).GameOfLife={})}(this,function(t){"use strict";var o=(i.prototype.liveOut=function(){for(var t=JSON.parse(JSON.stringify(this.matrix)),o=0;o<this.options.cols;o++)for(var i=0;i<this.options.rows;i++){var s=this.calcNeighbours(o,i);this.matrix[o][i]||3!==s||(t[o][i]=1),this.matrix[o][i]&&(s<2||3<s)&&(t[o][i]=0)}return this.matrix=t,this.canvas.draw(t),t},i.prototype.randomize=function(){for(var t=0;t<this.options.cols;t++)for(var o=0;o<this.options.rows;o++)this.matrix[t]||(this.matrix[t]=Array(this.options.cols)),this.matrix[t][o]=.5<=Math.random()?1:0},i.prototype.calcNeighbours=function(t,o){function i(t,o){return t<0&&(t=s.options.cols-1),t>=s.options.cols&&(t=0),o<0&&(o=s.options.rows-1),o>=s.options.rows&&(o=0),s.matrix[t][o]}var s=this;return[i(t-1,o-1),i(t,o-1),i(t+1,o-1),i(t-1,o),i(t+1,o),i(t-1,o+1),i(t,o+1),i(t+1,o+1)].reduce(function(t,o){return t+o},0)},i);function i(t,o){this.options=o,this.canvas=new s(t,{rows:this.options.rows,cols:this.options.cols,color:this.options.color}),this.options.seed?this.matrix=this.options.seed:(this.matrix=[],this.randomize()),this.canvas.draw(this.matrix)}var s=(r.prototype.draw=function(t){if(!this.ctx)throw new Error("Can't get 2d context of canvas");var o=parseInt(this.canvas.getAttribute("width")||"100",10),i=parseInt(this.canvas.getAttribute("height")||"100",10);this.ctx.clearRect(0,0,o,i);var s=o/this.options.cols,r=i/this.options.rows;this.ctx.strokeStyle=this.ctx.fillStyle=this.options.color?this.options.color:"#d0b3d1";for(var n=0;n<this.options.cols;n++)for(var e=0;e<this.options.rows;e++)t[n][e]&&this.ctx.fillRect(n*s,e*r,s,r)},r);function r(t,o){this.canvas=document.getElementById(t),this.options=o,this.ctx=this.canvas.getContext("2d")}t.Game=o,Object.defineProperty(t,"__esModule",{value:!0})});
diff --git a/dist/index.d.ts b/dist/index.d.ts
index 3bbf4dd..ecf286f 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -1,4 +1,8 @@
-export interface IGameOptions {
+export declare type CellType = 0 | 1;
+export interface IGameOptions extends ICanvasOptions {
+    seed?: Array<CellType[]>;
+}
+export interface ICanvasOptions {
     rows: number;
     cols: number;
     color?: string;
@@ -8,7 +12,7 @@ export declare class Game {
     private canvas;
     private matrix;
     constructor(elementId: string, options: IGameOptions);
-    calcGeneration(): void;
+    liveOut(): Array<CellType[]>;
     private randomize;
     private calcNeighbours;
 }
diff --git a/dist/index.html b/dist/index.html
index 5373007..d6525b5 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -48,7 +48,7 @@
 
             function playGame() {
                 if (!gameStarted) return;
-                game.calcGeneration();
+                game.liveOut();
                 window.requestAnimationFrame(playGame)
             }
 
diff --git a/package.json b/package.json
index 789ddb3..5287596 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "game-of-life",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "main": "dist/game-of-life.cjs.js",
   "module": "dist/game-of-life.esm.js",
   "author": "mrfrac <fracturer@gmail.com>",
diff --git a/src/index.ts b/src/index.ts
index cbba497..edf17b9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,10 @@
-export interface IGameOptions {
+export type CellType = 0 | 1;
+
+export interface IGameOptions extends ICanvasOptions {
+    seed?: Array<CellType[]>
+}
+
+export interface ICanvasOptions {
     rows: number;
     cols: number;
     color?: string;
@@ -7,20 +13,28 @@ export interface IGameOptions {
 export class Game {
     private options: IGameOptions;
     private canvas: Canvas;
-    private matrix: number[][];
+    private matrix: Array<CellType[]>;
 
     public constructor(elementId: string, options: IGameOptions) {
         this.options = options;
-        this.canvas = new Canvas(elementId, this.options);
-        this.matrix = [];
-
-        this.randomize();
+        this.canvas = new Canvas(elementId, {
+            rows: this.options.rows,
+            cols: this.options.cols,
+            color: this.options.color,
+        });
+
+        if (this.options.seed) {
+            this.matrix = this.options.seed;
+        } else {
+            this.matrix = [];
+            this.randomize();
+        }
 
         this.canvas.draw(this.matrix);
     }
 
-    calcGeneration(): void {
-        const newGeneration: number[][] = JSON.parse(JSON.stringify(this.matrix));
+    public liveOut(): Array<CellType[]> {
+        const newGeneration: Array<CellType[]> = JSON.parse(JSON.stringify(this.matrix));
 
         for (let i = 0; i < this.options.cols; i++) {
             for (let j = 0; j < this.options.rows; j++) {
@@ -32,13 +46,13 @@ export class Game {
 
         this.matrix = newGeneration;
         this.canvas.draw(newGeneration)
+        return newGeneration;
     }
 
     private randomize(): void {
         for (let i = 0; i < this.options.cols; i++) {
             for (let j = 0; j < this.options.rows; j++) {
                 if (!this.matrix[i]) this.matrix[i] = Array(this.options.cols);
-                //if (!this.matrix[i][j]) this.matrix[i][j] = 
                 this.matrix[i][j] = Math.random() >= 0.5 ? 1 : 0;
             }
         }
@@ -64,10 +78,10 @@ export class Game {
 
 class Canvas {
     private canvas: HTMLCanvasElement;
-    private options: IGameOptions;
+    private options: ICanvasOptions;
     private ctx: CanvasRenderingContext2D | null;
 
-    public constructor(elementId: string, options: IGameOptions) {
+    public constructor(elementId: string, options: ICanvasOptions) {
         this.canvas = document.getElementById(elementId) as HTMLCanvasElement;
         this.options = options;
         this.ctx = this.canvas.getContext("2d");