Rainbow effect

[Zero]

Well i was hoping that some one here could explain why this happens:
useing my oval (again) as an exmple; it works with anything aslong as you have a "for x/y:" as far as i know.

code:

setscreen ("graphic:vga") for x : 0 .. 100 by 10     for y : 0 .. 100 by 10         drawoval (320, 240, x, y, y)          delay(5)     end for end for

Why is it when you put the X or Y variable in for a colour you get this rainbow aray of colours for that shape?

(It turned out better then i thought, as one of my friends spent about aday or two trying to get this effect and now i get to rub it in his face )

[Tony]

because colors are represeted by a value 0-255

so since your x variable changes (because of the forloop), so are the colors that are being used for the ovals

[Zero]

ooohhh, ok cool, Thanks Tony

and i hope this time the topic name is more to your liking