startup

tank  = peripheral.wrap("back")
info  = tank.getTankInfo()
cap   = info[1]["capacity"]
name  = info[1]["contents"]["name"]
mb    = info[1]["contents"]["amount"]
b     = mb / 1000
perc  = math.floor(mb * 100 / cap)

modem   = "top"
monitor = 40

toMon = {cap, name, mb, b, perc}

rednet.open(modem)

while true do
  rednet.send(monitor,toMon)
  sleep(300)
end