Draw a funciton on the screen, like an oscilloscope, building on @jedgarpark Parsec on circle drawing

displayio_grapher.py

# builds on John Park's Parsec on drawing circle https://www.youtube.com/watch?v=nI55N6q0sUo
import math
import time
import random

# Set up the display
display = board.DISPLAY

# Create a blank displayio group
group = displayio.Group()
display.root_group = group  # put group on screen

palette = displayio.Palette(1)
palette[0] = 0x00ff00  # green
bitmap = displayio.Bitmap(5, 5, 1)  # 5x5 box, 1 color
tile = displayio.TileGrid(bitmap, pixel_shader=palette)  # stick bitmap in tilegrid
group.append(tile)  # add tilegrid to group

# Draws random values
def my_function_random(x):
    return random.randint(0, display.height-1)

# Draws a sine wave
def my_function_sine(x):
    amplitude = 50
    angle = (x / display.height) * math.pi * 2  # convert x to radians
    y = display.height/2 + (amplitude * math.sin(angle))
    return y

x = 0        # Where we currently are on the screen
x_speed = 5  # speed across the screen

while True:
    # Compute new x position
    x = (x + x_speed) % display.width

    # Compute new y position
    y = my_function_sine(x)

    # Update the box position
    tile.x = int(x)
    tile.y = int(y)

    # Update the display
    display.refresh()

    # Pause for a short time to control the speed of the animation
    time.sleep(0.05)

IMG_3444.mov