local pos = 18

mon = peripheral.wrap("back")
mon.clear()
mon.setBackgroundColor(colors.white)
mon.setTextColor(colors.black)
mon.setTextScale(3)

while true do

 if pos==-22 then -- pos==-NUMBER to make it even depending on length of message
	pos = 18
 end

 mon.clear()
 mon.setCursorPos(1,1)
 mon.write("Tree's Shack")
 mon.setCursorPos(pos,2)
 mon.write("Cheap Items | Rentable Power")
 pos = pos-1

 os.sleep(0.15)
 end