adon

local power = redstone.getInput("top")

while true do
if power == "false" then
term.setCursorPos(16,7)
term.setBackgroudnColor(colors.red)
print" "
 else
 term.setCursorPos(16,7)
 term.setBackgroundColor(colors.green)
 print" "
 end
 sleep(0.5)
end