diff --git a/rhythmblock.lua b/rhythmblock.lua
index 4ffcf88..1181d28 100644
--- a/rhythmblock.lua
+++ b/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 = width / 2
-centerHeight = width / 2
+centerWidth = round(width / 2)
+centerHeight = round(width / 2)
 peripherals = peripheral.getNames()
 playing = false
 if #peripherals < 0 then