Basic Clock

side = "top" --This is the side of the monitor
text = "Joss Inc."
mon = peripheral.wrap(side)
mon.setTextScale(2)
while true
do
 mon.setCursorPos(1,1)
 mon.write(text)
 mon.setCursorPos(1,2)
 mon.write(textutils.formatTime(os.time(),false)) -- use true for 12h time
 sleep(1)
 mon.clear()
 term.setCursorPos(1,1)
end