--[[Tree Chopping program by Sascha
Chops down the tree in front of turtle.]]
os.loadAPI('modules.lua') -- Load the modules module

print('Chopping tree...')

if not turtle.dig() then -- chop base of tree
  error('Turtle needs a digging tool!')
end

os.sleep(3) -- Wait until everything droppen from the tree
for j = 1, 4 do
  for i = 1, 4 do
    turtle.suck() -- Suck up everything
    turtle.turnLeft()
  end
  check_fuel()
  turtle.forward()
end

for i = 1, 4 do
  check_fuel()
  turtle.back()
end