Direwolf liquid transfer rate

p=peripheral.wrap("left")
while true do

time1=os.time()

a=p.getTankInfo()
amount1=a[1].contents.amount

sleep(60)

a=p.getTankInfo()
amount2=a[1].contents.amount

time2=os.time()-time1
difference=math.abs((amount1-amount2)/(time2*1000))
print(difference.." mB/t - "..(difference*20).." mB/s")

end

shell.run("lua")