CheckFuel

local HEIGHT = 19
local WIDTH = 51

local MaxFuel = 20000

term.clear()
term.setCursorPos(1,1)

fuelLevel = turtle.getFuelLevel()

print("Currently at fuel level: " .. fuelLevel .. " of " .. MaxFuel)

local percentage = (fuelLevel/MaxFuel)*100

print(percentage .. "% full \n")

sleep(.5)

if fuelLevel < 200 then
    bf = fuelLevel
    turtle.refuel()

    af = turtle.getFuelLevel()

    if af == bf then
        print("No fuel detected!")
    else
        print("Now at fuel level: " .. af)
        print(af-bf .. " fuel has been added.")
    end
else
    print("No fuel necessary.")
end