local ni = peripheral.wrap("back")
ni.canvas3d().clear()
local canvas = ni.canvas3d().create()
 
local el = {}
 
el[1] = canvas.addBox(0,0,0,1,1,1,0x00ff00ff)
el[2] = canvas.addFrame({3,3,3})
el[3] = canvas.addItem({-3,3,3},"minecraft:redstone",2)
el[4] = canvas.addItem({3,3,-3},"minecraft:crafting_table",2)
--el[5] = canvas.addLine({-3,3,-3},{0,0,0},10,0xff0000ff) --Not implemented
 
el[2].addRectangle(0, 0, 90, 90, 0x0000ffff)
el[2].addText({100,100}, "debug", 0xffffffff, 4)
 
local state = true
while true do
  for _,e in ipairs(el) do
   e.setDepthTested(state)
  end  
  sleep(2)
  state = not state
end