from codex import *
from time import sleep
import math

CENTER = 120

# Create a center line on the display
display.fill (BLACK)
display.draw_line(CENTER, 0, CENTER, 105, PINK)
display.draw_line(CENTER, 95, CENTER, 239, PINK)
display.draw_line(0, CENTER, 105, CENTER, PINK)
display.draw_line(95, CENTER, 239, CENTER, PINK)

x = CENTER

while True:
    val = accel.read()

    # Get only the x value
    tilt_x = val[0]

    # Scale the value to +/- 1.0
    scaled = (tilt_x / 16384)

    # Cap max and min value
    scaled = min(max(scaled, -1), 1)

    # Calculate degrees
    degrees = math.asin(scaled) * 180 / math.pi

    # Just an integer, please
    degrees = int(degrees)

    # Erase the old circle
    display.fill_rect(x, 105, 50, 30, BLACK)

    x = CENTER + degrees

    # Draw the box
    display.fill_rect(x, 105, 50, 30, BLUE)

    sleep(0.2)