lj.lua

local component = require("component")
local keyboard = require("keyboard")
local shell = require("shell")
local gpu = component.gpu
local hologram = component.hologram
local w, h = gpu.getResolution()

function round(num, idp)
  local mult = 10^(idp or 0)
  return math.floor(num * mult + 0.5 ) / mult
end

hologram.clear()
gpu.fill(1,1,w,h, " ")
gpu.setForeground(0xFFFFFF)
gpu.setBackground(0x000000)

--for x = 1, 48 do
--  for z = 1, 48 do
--    for y = 19, 20 do
--      hologram.set(20, 20, 20, 2)
--    end
--  end
--end

h = 24
k = 17
r = 15
step = 1

--hologram.fill(1,1,1,48,2)

for theta = 1, 360, step do
  x = h + r * math.cos(theta)
  y = k + r * math.sin(theta)
  --print("x: " .. x .. " y:" .. y)
  --gpu.set(x, y, "X")
  hologram.set(x, y, 20, 2)

end