Fast way to put pixels on the screen

> Hello,
>
> what is a fast way to put pixels on the screen?
>
> I have an array with coefficients between 0.0 and 1.0 and want to
> colour code them (0 white ... 1 blue).
>
> For smaller numbers (up to 50 X 50) I put morphs (rectangles) into a
> big morph and just set their colour.
>
> For small spots Form>>colorAt:put: might be an option, reading the
> coordinates for at: from a predefined array.
>
> But I might want to use 2x2 pixel dots in a 3x3 raster.
>
> I can think of using the examples in Pen for alternatives.
>
> Any experience?
>
>
> Thanks,
>
> Herbert                          mailto:[hidden email]
>
>