/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.tqRcNgsNE-z/rev.4
 * 
 * authors: 
 *   GoToLoop

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



/** 
 * Frame-Independant Animation (v2.1)
 * by Quarks (2013/Jul)
 * 
 * http://forum.processing.org/topic/scale-jumps-back-to-100
 * http://studio.processingtogether.com/sp/pad/export/ro.9jAqLpHlv-8K3/latest
 */

float x;
int y, lTime;

static final short VEL_X = 0200; // pixels per second
static final short DIM = 040, FPS = 60;
static final color BG = #C0F0C0, FG = #800000;

void setup() {
  size(400, 200);
  frameRate(FPS);
  fill(FG);
  noStroke();

  y = height >> 1;
  lTime = millis();
}

void draw() {
  // Get current time in milliseconds:
  final int cTime = millis();

  // Calculate elapsed time in seconds:
  final float eTime = 1e-3 * (cTime - lTime);

  // Reset last time ready for next draw:
  lTime = cTime;

  // Move x by velocity * elapsed time:
  x = (x + VEL_X*eTime) % width;

  background(BG);
  ellipse(x, y, DIM, DIM);
}