This command will set the screens red, green and blue gamma levels.

SET GAMMA Red, Green, Blue

Red

Integer
The red value

Green

Integer
The green value

Blue

Integer
The blue value

This command does not return a value.

You can change the gamma to fade in and out the contents of the screen or alter the ratio of colours displayed. The red, green and blue component values can range from 0 to 511, with 255 being the default values. Reducing these values fades each colour component out of the screen, and above the default value enhances the ratio of the component colour. Some graphics cards do not support gamma alteration.

cls

set display mode 800,600,32

set window on

maximize window

wait 1000*8

set gamma 255,255,255 

do

loop

end

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