trees

local h = 0
local t = 0
function TreeGrown()
    turtle.up()
    while t<1 do
        turtle.detect()
        sleep (10)
        if turtle.detect(true) then t=1 else t=0 end
    end
    turtle.down()
end

function TreeUp()
    h=0
    while turtle.detectUp() do
            turtle.digUp()
            turtle.up()
            h=h+1
   end

end

function TreeDown()
    while h>-1 do
    turtle.down()
    if h>0 then turtle.digDown() end
    h=h-1
    end
end

function TreeDownB()
    while h>-1 do
    turtle.down()
    if h>1 then turtle.digDown() end
    h=h-1
    end
end

function TreePlant1x1()
    turtle.up()
    turtle.forward()
    turtle.select(1)
    turtle.placeDown()
    turtle.back()
    turtle.down()
    sleep(1)
end


function TreePlant2x2()
    turtle.up()
    turtle.forward()
    turtle.select(1)
    turtle.placeDown()
        turtle.forward()
        turtle.placeDown()
            turtle.turnRight()
            turtle.forward()
            turtle.placeDown()
                turtle.turnRight()
                turtle.forward()
                turtle.placeDown()
                    turtle.turnRight()
                    turtle.forward()
                        turtle.turnLeft()
                        turtle.forward()
                        turtle.down()
                        turtle.turnRight()
                        turtle.turnRight()
    sleep(1)
end

while turtle.getFuelLevel() > 350 do
    h=0
    turtle.select(2)
    turtle.dig()
    turtle.forward()
    if turtle.detect(true) then
        TreeUp()
        turtle.dig()
        turtle.forward()
        TreeDown()
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        TreeUp()
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        TreeDown()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        turtle.turnRight()
        TreePlant2x2()
        TreeGrown()
    else
        TreeUp()
        TreeDownB()
        turtle.forward()
        turtle.turnRight()
        turtle.turnRight()
        TreePlant1x1()
        TreeGrown()
    end
print("out of fuel")
end