state = false

while true
do
  if redstone.getAnalogInput("back") == 15 then
    state = true
    redstone.setOutput("right", true)
    print("Generator Full! Discharging!")
    while redstone.getAnalogInput("back") !=0
      do
        sleep(10)
      end
      state = false
  else
    sleep(10)
  end
end

if !state then
  redstone.setOutput("right", false)
  print("Generator Empty! Charging!")
end
sleep(10)
end

function sleep(n)
  os.execute("sleep " .. tonumber(n))
end