local component = require('component')
local ob = component.openperipheral_bridge
local camera = component.camera

local color = {}

local r, g, b = 255, 0, 0

for g = 0, 255, 8 do
  table.insert(color, r*65536+g*256+b)
end
g = 255
for r = 255, 0, -8 do
  table.insert(color, r*65536+g*256+b)
end
r = 0
for b = 0, 255, 8 do
  table.insert(color, r*65536+g*256+b)
end
b = 255
for g = 255, 0, -8 do
  table.insert(color, r*65536+g*256+b)
end

function render(size, zoom, fog, side)
  local tbl, d, pix = {}
  if not fog then
    fog = 1.2
  end
  if side == 0 then
    look = camera.distanceDown
  elseif side == 1 then
    look = camera.distanceUp
  else
    look = camera.distance
  end
  local yp = 1
  for x = zoom, -zoom, -size do
    tbl[yp] = {}
    for y = -zoom, zoom, size do
      d = look(x, 0-y)
      if d < 0 then d = 32 end
      table.insert(tbl[yp], color[math.ceil(d*(#color/32))])
    end
    yp = yp + 1
  end
  return tbl
end

local function draw(data, size)
  if not size then
    size = 2
  end
  for j = 1, #data do
    for i = 1, #data[j] do
      ob.addBox(i*size, j*size, size, size, data[i][j])
      os.sleep()
    end
    ob.sync()
  end
end

ob.clear()

draw(render(0.03, 1, 1), 3)