Clean up the code to make it more efficient

sample/sample-module-test.lua

@@ -3,24 +3,21 @@
 Demonstrate the use of the sample library
 ]]
 
+local sum
+
 function love.load()
     love.graphics.setFont(love.graphics.newFont(11))
 
     -- Will display all the modules loaded onto the console.
     for key,value in pairs(love) do
         print("found member " .. key);
     end
-end
-
-function love.draw()
-    -- Gets the x- and y-position of the mouse.
-    local x = 50
-    local y = 50
 
-
     -- Will use the `doSum` function for the `love.sample` module
-    local sum = love.sample.doSum(2, 4)
+    sum = love.sample.doSum(2, 4)
+end
 
+function love.draw()
     -- Draws the position on screen.
     love.graphics.print("The sum is " .. sum, 50, 50)
-end
+end