AMOSi:Flash
an example can be found on AMOSPro_Examples:Examples/H-2/Help_25.AMOS
FLASH automatically flicks a selected colour through a range of values using interrupts.
Flash index,"(RGB,delay)(RGB,delay)"
index enters the colour to be changed.
RGB holds a new colour value in Red Green Blue format.
delay sets the period this colour will be held on the screen in 50ths of a second.