local turtleUtils = require('turtle-utils')

local function main()
  local initialFuelLevel = turtle.getFuelLevel()
  print('Current fuel: ' .. turtleUtils.getFuelPercentage()  .. '%')

  turtleUtils.refuelAllFromInventory()

  if initialFuelLevel == turtle.getFuelLevel() then
    error('nothing to refuel', 0)
  end

  print('New fuel: ' .. turtleUtils.getFuelPercentage()  .. '%')
end

main()