rctl

HIGH_WATER = 8000000
LOW_WATER = 1000000

reactor = peripheral.wrap("right")
if nil == reactor then
  error("Unable to wrap cell.")
end

function ControlReactor()
  local energy = reactor.getEnergyStored()
  print ("Energy: "..energy)
end

while 1 < 2 do
  ControlReactor()
  sleep(1)
end