OpenPheripheral | Basics

local glasses = peripheral.wrap("top")
glasses.clear()

glasses.addBox(5,5,50,50,0x000000,0.2)
glasses.addText(10,10,"Reactor",0x00BFFF)

glasses.sync()

while true do
    local event = { os.pullEvent() }

    if event[1] == "glasses_chat_command" then
        if event[5] == "test" then
            glasses.clear()
            glasses.addBox(5,5,50,50,0xFFFFFF,1)
            glasses.addText(10,10,"WORKING",0x00BFFF)
            glasses.sync()
        end
    end
end