function line(l)
for i=1,l,1 do

	turtle.dig()
	turtle.digDown()
	turtle.forward()
end
end

function move(d)

for i=1,d,1 do

turtle.forward()
end
end

function turn()
turtle.turnLeft()
turtle.turnLeft()
end

line(4) --T
turtle.turnRight()
line(10)
turn()
move(10)
turtle.turnRight()
line(4)