Art exercise for nature of code oscillation. Runnable at https://editor.sketchingpy.org/. BSD-3-Claude license.

periodic_balls.py

import math
import time

import sketchingpy

COLOR_SPEEDS = {
    '#33333330': 0.2,
    '#33333370': 0.4,
    '#333333A0': 0.6,
    '#333333F0': 0.8
}


class Ball:
    
    def __init__(self, x, center_y, color, multiplier, offset):
        self._x = x
        self._center_y = center_y
        self._color = color
        self._multiplier = multiplier
        self._offset = offset
    
    def draw(self, sketch):
        sketch.push_style()
        
        norm = math.sin(time.time() * self._multiplier + self._offset)
        amplitude = norm * 200
        y = self._center_y + amplitude
        
        sketch.set_ellipse_mode('radius')
        sketch.clear_stroke()
        sketch.set_fill(self._color)
        sketch.draw_ellipse(self._x, y, 10, 10)
        
        sketch.pop_style()



def make_balls():
    balls = []
    
    for x_pos in range(25, 500, 25):
        for (color, speed) in COLOR_SPEEDS.items():
            balls.append(Ball(x_pos, 250, color, speed, x_pos / 25))
    
    return balls

balls = make_balls()


def on_step(sketch):
    sketch.clear('#F0F0F0')
    for ball in balls:
        ball.draw(sketch)


sketch = sketchingpy.Sketch2DWeb(500, 500)
sketch.on_step(on_step)
sketch.show()