I thought this might work, but it's not...
menueMaterial = LoadMaterial("abstract::Menue.mat")
menue = DrawImage(menueMaterial,0,0,1,1)
on = 1
if KeyDown(Key_U)==1 then
DrawImage(menueMaterial,1,1,1,1)
if on== 1 then
DrawImage(menueMaterial,1,1,1,1)
on = 0
else
FreeEntity(menue)
on = 1
end
end