function BucketChecker()
 while turtle.getItemCount(1) < 1 do
 sleep(60)
end

function MilkCow()
 turtle.place()
end

function PlaceFilledBucketinMachine()
 turtle.dropUp()
 sleep(5)
end

while true do
 BucketChecker()
 MilkCow()
 PlaceFilledBucketinMachine()
end