local component = require("component") local gpu = component.gpu -- get primary gpu component local w, h = gpu.getResolution() gpu.fill(1, 1, w, h, " ") -- clears the screen gpu.setForeground(0x000000) gpu.setBackground(0xFFFFFF) gpu.fill(1, 1, w/2, h/2, "X") -- fill top left quarter of screen gpu.copy(1, 1, w/2, h/2, w/2, h/2) -- copy top left quarter of screen to lower right