Rectangular Prism Maker

function prism(x,y,z)
for i = 1,x-1 do
turtle.place()
turtle.back()
end
for i = 1,y-1 do
turtle.place()
turtle.up()
end
for i = 1,z-1 do
turtle.place()
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
end
for i = 1,y-1 do
turtle.place()
turtle.down()
end
for i = 1, z-2 do
turtle.place()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
end
turtle.place()
turtle.up()
turtle.forward()
turtle.forward()
turtle.down()
turtle.turnRight()
for i = 1,z-3 do
turtle.forward()
end
for i = 1,x-1 do
turtle.place()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
end
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
for i = 1,y-1 do
turtle.place()
turtle.up()
end
for i = 1,z-1 do
turtle.place()
turtle.back()
end
for i = 1,y-1 do
turtle.place()
turtle.down()
end
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.turnRight()
for i = 1,z do
turtle.place()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
end
for i = 1,y do
turtle.up()
end
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.down()
for i = 1,x-1 do
turtle.place()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
end
turtle.up()
for i = 1,z do
turtle.forward()
end
turtle.turnRight()
for i = 1,x-1 do
turtle.placeDown()
turtle.forward()
end
end