while true do

--Collect
for i = 1,3 do
for i = 1,14 do
turtle.digDown()
turtle.forward()
end
turtle.turnRight()
for i = 1,3 do
turtle.forward()
end
turtle.turnRight()
for i = 1,13 do
turtle.digDown()
turtle.forward()
end
turtle.turnLeft()
for i = 1,3 do
turtle.forward()
end
turtle.turnLeft()
end

-- Drop off

turtle.turnLeft()
for i = 1,20 do
turtle.forward()
end

for i = 16,1,-1 do
turtle.select(i)
turtle.dropDown()
end

turtle.turnLeft()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
end