Tanks Minecraft modded World

local modem = peripheral.wrap("right")
local channel = 42
local channelbps = 43
local numtank = 1

while true do
    local tank = peripheral.wrap("back").getTanks()[1]
    local capacity = tank.capacity
    local amount = tank.amount
    local percent = math.floor(amount/capacity*100)
    local bOne = math.floor(amount/1000)
    sleep(1)
    local amount2 = peripheral.wrap("back").getTanks()[1].amount
    local bTwo = math.floor(amount2/1000)
    local bps = bTwo - bOne
    modem.transmit(channel,numtank, percent)
    print("Send on :"..channel.."  I'm :"..numtank.."  Value:"..percent.."%")
    modem.transmit(channelbps,numtank, bps)
    print("Send on :"..channelbps.."  I'm :"..numtank.."  Value:"..string.sub(tostring(bps), 0,4).." bps")
end