redrawing canvas html5 without flickering

Question

I\'ve a screen being redraw every 25ms, and images are flickering, here is my code

                var FRAME_RATE = 40;
                var intervalTime = 10         


        

Answer 1

Load all images and other data before draw and storage them inside array.
Better use requestAnimationFrame.
Remember, getting JSON (or other data) can take some time.