in these days, screensavers are just pretty. if you want to avoid a screenburn, just make one that changes the color after a second
edit:
anti-screen-burn screensaver, have fun.
edit:
Graphics 1024,768,32,2:SetBuffer BackBuffer():While Not GetKey():ClsColor Rand(255),Rand(255),Rand(255):Cls:Flip 0:Delay 100:Wend(129 bytes of code)
anti-screen-burn screensaver, have fun.