Spruce Tree Killer

while true do

function chop()
    while turtle.compare(15) do
        turtle.dig()
        turtle.digUp()
        turtle.up()
    end
end

function down()
    while not turtle.detect(not turtle.detectDown()) do
        turtle.down()
    end
end

function drop()
    for i=1, 4 do
        turtle.select(i)
        turtle.drop()
    end
end

function replant()
    if turtle.detect(turtle.compare(16)) then
        turtle.up()
    else
        if not turtle.detect(turtle.detectDown()) then
            turtle.select(16)
            turtle.suckDown()
            turtle.drop(turtle.getItemCount(16) -2)
            turtle.place()
            replant()
        end
    end
end
sleep(5)
end