View source for Road Sign Square

<pre id='shellbody' data-qtp='canvas'></pre>
== Road Sign Version 1 ==
<div class=qu data-width=150 data-height=150>
[[File:roadsignsquare1.png|border|Diversion Square]]
* The yellow square has side 150, the radius of the corner is 40.
* The black square is 100, the line width is 16.
* The yellow is rgb(255,227,0)
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<pre class=usr>
function drawFlag(ctx){
  ctx.fillStyle = 'rgb(255,227,0)';
  ctx.fillRect(0,0,150,150);
  ctx.lineWidth = 16;
  ctx.strokeStyle = 'black';
  ctx.moveTo( 25, 25);
  ctx.lineTo(125, 25);
  ctx.lineTo(125,125);
  ctx.lineTo( 25,125);
  ctx.closePath();
  ctx.stroke();
}
</pre>
<pre class=ans>
function drawFlag(ctx){
  ctx.fillStyle = 'rgb(255,227,0)';
  ctx.fillRect(0,0,150,150);
  ctx.lineWidth = 16;
  ctx.strokeStyle = 'black';
  ctx.moveTo( 25, 25);
  ctx.lineTo(125, 25);
  ctx.lineTo(125,125);
  ctx.lineTo( 25,125);
  ctx.closePath();
  ctx.stroke();
}
</pre>
</div>

== Get it right ==
<div class=qu data-width=160 data-height=160>
[[File:roadsign2.png|border|Diversion Square]]
* The drawing surface is 160 by 160
* The yellow square has side 150, the radius of the corner is 20.
* The black square is 100, the line width is 16.
* The yellow is rgb(255,227,0)
<pre class=usr>
function drawFlag(ctx){
  ctx.fillStyle = 'rgb(255,227,0)';
  ctx.lineWidth = 2;
  ctx.strokeStyle = 'black';
  ctx.translate(80,80);
  ctx.moveTo(-55,-75);
  ctx.lineTo(55,-75);
  ctx.arc(55,-55, 20, -Math.PI/2, 0);
  ctx.rotate(Math.PI/2);
  ctx.lineTo(55,-75);
  ctx.arc(55,-55, 20, -Math.PI/2, 0);
  ctx.rotate(Math.PI/2);
  ctx.lineTo(55,-75);
  ctx.arc(55,-55, 20, -Math.PI/2, 0);
  ctx.rotate(Math.PI/2);
  ctx.lineTo(55,-75);
  ctx.arc(55,-55, 20, -Math.PI/2, 0);
  ctx.rotate(Math.PI/2);
  ctx.stroke();
  ctx.fill();
  ctx.beginPath();
  ctx.lineWidth = 16;
  ctx.moveTo(50,50);
  ctx.lineTo(50,-50);
  ctx.lineTo(-50,-50);
  ctx.lineTo(-50,50);
  ctx.closePath();
  ctx.stroke();
}

</pre>
<pre class=ans>
function drawFlag(ctx){
  ctx.translate(80,80);
  ctx.fillStyle = 'rgb(255,227,0)';
  ctx.strokeStyle = 'black';
  ctx.moveTo(55,-75);
  ctx.arc(55,-55,20,-Math.PI/2,0 );
  ctx.lineTo(75,55);
  ctx.rotate(Math.PI/2);
  ctx.arc(55,-55,20,-Math.PI/2,0 );
  ctx.lineTo(75,55);
  ctx.rotate(Math.PI/2);
  ctx.arc(55,-55,20,-Math.PI/2,0 );
  ctx.lineTo(75,55);
  ctx.rotate(Math.PI/2);
  ctx.arc(55,-55,20,-Math.PI/2,0 );
  ctx.lineTo(75,55);
  ctx.rotate(Math.PI/2);
  ctx.fill();
  ctx.stroke();
  ctx.beginPath();
  ctx.lineWidth = 16;
  ctx.moveTo(50,50);
  ctx.lineTo(50,-50);
  ctx.lineTo(-50,-50);
  ctx.lineTo(-50,50);
  ctx.closePath();
  ctx.stroke();
}
</pre>
</div>