clear
txt = "Hello World! "
width = txt.len * 20 + 4
gfx.print txt,0,608,color.white, "large"
toggle = false

while true
	img1 = gfx.getImage(toggle, 608, width - 1, 32)
	img2 = gfx.getImage((not toggle) * (width - 1), 608, 1, 32)
	gfx.drawImage img1, (not toggle), 608
	gfx.drawImage img2, toggle * (width - 1), 608
	if key.available then
		toggle = not toggle
		key.clear
	end if
	yield
end while