function iff (z)
if a[z]==1 then
turtle.select(1)
elseif a[z]==2 then
turtle.select(2)
elseif a[z]==3 then
turtle.select(3)
elseif a[z]==4 then
turtle.select(4)
elseif a[z]==5 then
turtle.select(5)
elseif a[z]==6 then
turtle.select(6)
end
end
a={1,2,2,2,1,1,1,2,2,2,1 ,
   1,2,1,1,2,2,2,1,1,2,1 ,
   1,1,1,2,1,1,1,2,1,1,1 ,
   1,1,1,2,2,2,2,2,1,1,1,}
z=0

turtle.up()
for x=1,2  do
for y = 1,11 do
turtle.placeDown()
z=z+1
iff(z)
turtle.placeDown()
turtle.forward()
end
turtle.turnRight()
turtle.forward()
turtle.turnRight()
for y = 1,11 do
z=z+1
iff(z)
turtle.placeDown()
turtle.forward()
end
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
end