Overwrite

label = "Cloud's Test Turtle | "
oldfwd = turtle.forward

function turtle.forward()
os.setComputerLabel(label..tostring(turtle.getFuelLevel()))
oldfwd()
end
olddwn = turtle.down
function turtle.down()
os.setComputerLabel(label..tostring(turtle.getFuelLevel()))
olddwn()
end
oldup = turtle.up
function turtle.up()
os.setComputerLabel(label..tostring(turtle.getFuelLevel()))
oldup()
end
oldback = turtle.back
function turtle.back()
os.setComputerLabel(label..tostring(turtle.getFuelLevel()))
oldback()
end