Added new pipe design to the sketch.js file

I have addressed the issue raised CodingTrain#24 and have gone ahead to create an original and new pipe design which also fits the theme of the Flappy Bird Clone Game and have ensured to replace the current pipe design with the new design which has been edited in the sketch.js file as well as the graphics folder

sketch.js

@@ -26,8 +26,8 @@ var prevTouched = touched;
 
 
 function preload() {
-  pipeBodySprite = loadImage('./graphics/pipe_body.png');
-  pipePeakSprite = loadImage('./graphics/pipe_body.png');
+  pipeBodySprite = loadImage('graphics/pipe_marshmallow.png');
+  pipePeakSprite = loadImage('graphics/pipe_marshmallow.png');
   birdSprite = loadImage('graphics/train.png');
   bgImg = loadImage('graphics/background.png');
 }