startup

local var1 = 1
local var2 = 1
local var3 = 1
m = peripheral.wrap("back")

while true do
  var1 = m.getEnergyStored()
  if var1 >= 7500000 then
    m.setActive(false)
  elseif var1 < 7500000 then
    m.setActive(false)
  end
  sleep(5)
end