added rounding function

rhythmblock.lua

@@ -2,9 +2,13 @@ accentColor = colors.gray
 buttonColor = colors.lightGray
 backgroundColor = colors.black
 
+function round(n)
+    return n % 1 >= 0.5 and math.ceil(n) or math.floor(n)
+end
+
 width, height = term.getSize()
-centerWidth = math.round(width / 2)
-centerHeight = math.round(width / 2)
+centerWidth = round(width / 2)
+centerHeight = round(width / 2)
 peripherals = peripheral.getNames()
 playing = false
 if #peripherals < 0 then