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JS code golfing

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<canvas id="c"></canvas>

JavaScript

s=20;W='#fff';M=Math;R=M.random;ctx=document.getElementById('c').getContext('2d');cr=`#${M.floor(R()*16777215).toString(16).slice(0,3)}`;f=Array(5).fill();a=f.map((_,i)=>f.map((_,j)=>R()*2|0));a.map((c,x)=>c.map((v,y)=>{ctx.fillStyle=y>=3?c[y==3?1:0]?cr:W:c[y]?cr:W;ctx.fillRect(y*s,x*s,s,s);}));

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JS code golfing

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JavaScript

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Fiddle Pages

Use pre-released features

Fiddle collections

Private collections and fiddles

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