Easy Flags

<canvas width=150 height=100></canvas>

drawFlag(document.querySelector('canvas').getContext('2d'));

Libya

The flag of Libya, until 2011, was a simple green rectangle.

Try the program as it is given, then change it so that the green rectangle is 150 wide.

function drawFlag(ctx)
{
  ctx.fillStyle = 'green';
  ctx.fillRect(0,0,75,100);
}  

function drawFlag(ctx)
{
  ctx.fillStyle = 'green';
  ctx.fillRect(0,0,150,100);
}