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+====== Using objects ======
+<file lua main.lua>
+--[[-------------------------------------
+- Objects in arrays.
+- Mithat Konar
+-------------------------------------]]--
+---------------------------------------------
+-- Functions to create circle data objects --
+---------------------------------------------
+--[[ Return a data object that has a circle's properties. ]]--
+function createCircle(x_, y_, radius_, hSpeed_)
+    local theCircle = {
+        x = x_,
+        y = y_,
+        radius = radius_,
+        hSpeed = hSpeed_
+    }
+    return theCircle
+end
+-------------------------------------------------------
+-- Functions for using/modifying circle data objects --
+-------------------------------------------------------
+--[[ Move a circle to the right, wrapping it around when necessary. ]]--
+function circleMoveHorizWrap(circle, dt)
+    circle.x = circle.x + circle.hSpeed * dt
+    if circle.x > (love.graphics.getWidth() + circle.radius) then
+        circle.x = -circle.radius
+    end
+end
+--[[ Render a circle on the screen. ]]--
+function circleRender(circle)
+    love.graphics.circle("fill", circle.x, circle.y, circle.radius)
+end
+--------------------
+-- LÖVE functions --
+--------------------
+--[[ Create game globals and initial conditions. ]]--
+function love.load()
+    -- circle constants
+    CIRCLE_DEFAULT_SPEED = 100
+    CIRCLE_DEFAULT_SIZE = 30
+    -- create array of drawable circles
+    circlesArray = {}
+    -- populate the array with as many circles as you want!
+    table.insert(circlesArray, createCircle(0, 100, CIRCLE_DEFAULT_SIZE, CIRCLE_DEFAULT_SPEED))
+    table.insert(circlesArray, createCircle(0, 200, CIRCLE_DEFAULT_SIZE / 1.5, CIRCLE_DEFAULT_SPEED * 1.5))
+    table.insert(circlesArray, createCircle(0, 300, CIRCLE_DEFAULT_SIZE * 1.5, CIRCLE_DEFAULT_SPEED / 1.5))
+    table.insert(circlesArray, createCircle(0, 400, CIRCLE_DEFAULT_SIZE / 2, CIRCLE_DEFAULT_SPEED * 2))
+end
+--[[ Update values of game parameters. ]]--
+function love.update(dt)
+    -- move all the circles as needed
+    for i=1,#circlesArray do
+        circleMoveHorizWrap(circlesArray[i], dt)
+    end
+end
+--[[ Render the game elements. ]]--
+function love.draw()
+    -- draw all the circles
+    for i=1,#circlesArray do
+        circleRender(circlesArray[i])
+    end
+end
+</file>