plantTrees

function shiftRight()
    turtle.turnRight()
    for i=1, 6 do
        turtle.forward()
    end
    turtle.turnRight()
    turtle.back()
    turtle.back()
end

function shiftLeft()
    turtle.turnLeft()
    for i=1, 6 do
        turtle.forward()
    end
    turtle.turnLeft()
    turtle.back()
    turtle.back()
end

function returnHome()
    for i=1, 4 do
        turtle.back()
    end
    turtle.turnRight()
    for i=1, 18 do
        turtle.forward()
    end
    turtle.turnLeft()
end

function dropGoods()
    turtle.turnRight()
    turtle.turnRight()
    for i=1, 14 do
        turtle.select(i)
        turtle.drop()
    end
    turtle.turnRight()
    turtle.turnRight()
end


--Main

turtle.select(16)
turtle.turnRight()  --Staring position
turtle.turnRight()
for i=1, 6 do
    turtle.back()
end

for i=1, 4 do       --First Row
    turtle.place()
    for j=1, 6 do
        turtle.back()
    end
end
turtle.place()

shiftRight()
for i=1, 4 do       --Second Row
    turtle.place()
    for j=1, 6 do
        turtle.back()
    end
end
turtle.place()

shiftLeft()
for i=1, 4 do       --Third Row
    turtle.place()
    for j=1, 6 do
        turtle.back()
    end
end
turtle.place()

shiftRight()
for i=1, 4 do       --Fourth Row
    turtle.place()
    for j=1, 6 do
        turtle.back()
    end
end
turtle.place()

returnHome()
dropGoods()