Holoclock CC

local hologram = peripheral.find("hologram")

local date
local config = {
    dateColor = 0xFFFFFF,
    holoScale = 2
}

local symbols = {
    ["0"] = {
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    ["1"] = {
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
    },
    ["2"] = {
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 0 },
        { 1, 0, 0, 0, 0 },
        { 0, 1, 1, 1, 0 },
    },
    ["3"] = {
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    ["4"] = {
        { 0, 0, 0, 0, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
    },
    ["5"] = {
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 0 },
        { 1, 0, 0, 0, 0 },
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    ["6"] = {
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 0 },
        { 1, 0, 0, 0, 0 },
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    ["7"] = {
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 0 },
    },
    ["8"] = {
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    ["9"] = {
        { 0, 1, 1, 1, 0 },
        { 1, 0, 0, 0, 1 },
        { 1, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
        { 0, 0, 0, 0, 1 },
        { 0, 0, 0, 0, 1 },
        { 0, 1, 1, 1, 0 },
    },
    [":"] = {
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 1, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 1, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
    },
    ["."] = {
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 0, 0, 0 },
        { 0, 0, 1, 0, 0 },
    }
}

local function drawSymbolOnProjector(x, y, z, symbol)
    local xPos = x
    for j = 1, #symbols[symbol] do
        for i = 1, #symbols[symbol][j] do
            if symbols[symbol][j][i] == 1 then
                hologram.set(xPos, y, z, 1)
            else
                hologram.set(xPos, y, z, 0)
            end
            xPos = xPos + 1
        end
        xPos = x
        y = y - 1
    end
end

local function drawText(x, y, text)
    for i = 1, string.len(text) do
        local symbol = string.sub(text, i, i)
        drawSymbolOnProjector(i * 6 + 4, 16, 24, symbol)
    end
end

local function centerText(text)
    local textWidth = string.len(text) * 6
    local holoWidth = 48
    drawText(math.floor(textWidth - (holoWidth / 2)), 1, text)
end

hologram.clear()
hologram.setTranslation(0, 0, 0)
hologram.setPaletteColor(1, config.dateColor)
hologram.setScale(config.holoScale)

while true do
    local time = os.time()
    local hour = math.floor(time)
    local min = math.floor((time - hour) * 60)
    centerText(("%02d:%02d"):format(hour, min))
    sleep(0.2)
end