hi,
thank you som much,
i try your code it works,

but i need your help with 2 things.
first .what you mean or how i can Create form properties .x = 0, .y = 0, .i = 0, && i miss understand

second how i can fill the line or any shape with colors
thanks.
>I forgot to mention; for a quick test (experiment), I put all the code in Form.Init(). Of course, you will have to decide eventually when you want to execute the code, for example, in a Button.KeyPress(), or with a Timer.
>
>Here is another example, with a Timer, which will draw the sine curve slowly.
>
>Create form properties .x = 0, .y = 0, .i = 0, and place the following code into the Timer.Timer Event:
>
>

>with ThisForm
>	.i = .i + 0.05
>	.x = .i*100
>	.y = sin(.i)*100 + 100
>	.Line(.x, .y)
>	if .i >= 2*pi()
>		This.Enabled = .F.
>	endif
>endwith
>

>
>I know, it is not perfect; this is just a quick sample. I'll leave the details to you.