Easing

Move the mouse across the screen and the symbol will follow. Between drawing each frame of the animation, the program calculates the difference between the position of the symbol and the cursor. If the distance is larger than 1 pixel, the symbol moves part of the distance (0.05) from its current position toward the cursor.

from p5 import *

x = 0
y = 0
easing = 0.05

def setup():
        size(640, 360)
        no_stroke()

def draw():
        background(51)

        global x, y, easing
        targetX = mouse_x
        dx = targetX - x
        x += dx * easing

        targetY = mouse_y
        dy = targetY - y
        y += dy * easing

        ellipse((x, y), 66, 66)

if __name__ == '__main__':
        run()