Remember, there's nothing special about the use of the word "colour":
function fillCircle (x, y, radius, colour) {
ctx.beginPath();
ctx.fillStyle= colour;
ctx.arc(x, y, radius, 0, Math.PI * 2);
ctx.fill();
}
fillCircle(150, 150, 20, "red");
This would have worked just as well:
function fillCircle (x, y, radius, hue) {
ctx.beginPath();
ctx.fillStyle= hue;
ctx.arc(x, y, radius, 0, Math.PI * 2);
ctx.fill();
}
fillCircle(150, 150, 20, "red");
Or even this:
function fillCircle (x, y, radius, mood) {
ctx.beginPath();
ctx.fillStyle= mood;
ctx.arc(x, y, radius, 0, Math.PI * 2);
ctx.fill();
}
fillCircle(150, 150, 20, "red");
Just choose names that
make sense to you.