x = 0
i = 1
turtle.up()
function inventory()
if turtle.getItemCount(i) == 0 then
 i = i+1
 turtle.select(i)
end

function layBrick()
while turtle.detect() == false do
inventory()

turtle.placeDown()
turtle.forward()
x = x+1
if turtle.detect() == true then
turtle.turnRight()
turtle.forward()
turtle.turnRight()

while x > 0 do
inventory()

turtle.placeDown()
turtle.forward()
x = x-1
if x == 0 then
inventory()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
end
end
end
end
end
for y=0,2 do
layBrick()
end