View difference between Paste ID: KWrHCW8c and 1HT8k0jn

 local component = require "component"
 local event = require "event"
 local term = require "term"
 local computer = require "computer"
 local gpu = component.gpu
 
 local key_space = require("keyboard").keys.space
 local running = true
 local x, y, width, height
-local outputWidth = 9 -- 00:00.000 == 9 chars
+local outputWidth = 12 -- 00000:00.000 == 9 chars
 local startTime, timerEvent
 
 local events = setmetatable({}, {__index = function() return function() end end})
 function events.key_up(keyboard, char, code, player)
   if (code == key_space) then
     running = false
   end
 end
 
 function events.screen_resized(screenAddress, newWidth, newHeight)
   width, height = newWidth, newHeight
   x = math.max(1, math.floor((width - outputWidth) / 2))
   y = math.max(1, math.floor(height / 2))
 
   term.clear()
   clockTimer(true)
 end
 
 function events.touch(adr, x, y, button, player)
   if (timerEvent) then
     event.cancel(timerEvent)
     timerEvent = nil
   else
     startTime = computer.uptime()
     timerEvent = event.timer(1/20, clockTimer, math.huge)
   end
 end
 
 function clockTimer(reset)
   if (reset) then
     gpu.set(x, y, "00:00.000")
   else
     local m, s, ms
     local t = math.floor((computer.uptime() - startTime) * 1000)
     ms = t % 1000
     t = math.floor(t / 1000)
     s = t % 60
     t = math.floor(t / 60)
     m = t % 60
-    gpu.set(x, y, string.format("%02d:%02d.%03d", m, s, ms))
+    gpu.set(x, y, string.format("%05d:%02d.%03d", m, s, ms))
   end
 end
 
 function handleEvent(event, ...)
   if (event) then
     events[event](...)
   end
 end
 
 local prevWidth, prevHeight = gpu.getResolution()
 if (not gpu.setResolution(outputWidth, 1)) then
   events.screen_resized(false, prevWidth, prevHeight)
 end
 
 while running do
   handleEvent(event.pull())
 end
 
 if (timerEvent) then event.cancel(timerEvent) end
 gpu.setResolution(prevWidth, prevHeight)