```python
def setup():
global blur
py5.size(640, 360, py5.P2D)
# shaders files must be in the "data" folder to load correctly
blur = py5.load_shader("blur.glsl")
py5.stroke(0, 102, 153)
py5.rect_mode(py5.CENTER)
def draw():
py5.apply_filter(blur)
py5.rect(py5.mouse_x-75, py5.mouse_y, 150, 150)
py5.ellipse(py5.mouse_x+75, py5.mouse_y, 150, 150)
```