disco

if(not os.loadAPI("hydraApi")) then
    error("Could not load hydraApi")
end

local glows = hydraApi.getAllPeripherals("glowstone_illuminator")

while true do
    for k,glow in pairs(glows) do
        local color = math.random (256*256*256)
        color = string.format("0x%X", color)
        glow.setColor(color)
    end
    os.sleep(0.1)
end