Learn programming 5: Light speed effect, change line colors

Learn how to change line colors and make some kind of disco laser effect and a very simple light speed effect. We also show the option to auto-format the source code, which adds and removes spaces to make it all beautifully aligned.

On the first day we were drawing dots and lines, but they were all black.

Let's check out how we can change the color of those lines.

We quickly saw yesterday that 'stroke' is used to change it.

We didn't try it out, but we opened this page here and saw stroke can change the color of the border.

In the same way, 'background' changes the whole background of the screen.

'stroke' changes the color of the next drawing action.

See? "Sets the color used to draw lines and borders around shapes."

So it looks like it works the same way as background.

You can have stroke with one number. So you get a grey value, or you can make a stroke with three RGB values.

So then we'll call 'stroke' first and then draw lines.

If this is RGB, the first value is red, then green and blue. This way we can make a red line.

Now, what's the syntax for line?

We have 'line();' and in the middle we have to enter four numbers.