try:
    import blinkt
except ImportError:
    import blinkt_sim as blinkt

import time
import sys

try:
    import blinkt
    print("Blinkt! detected")
except ImportError:
    from blinkt_sim import blinkt_sim as blinkt
    print("Using Blinkt! simulator")

print("Press Ctrl+C to exit")

try:
    while True:
        for i in range(8):
            blinkt.clear()
            blinkt.set_pixel(i, 255, 0, 0, 0.75)
            blinkt.show()
            time.sleep(0.1)

except KeyboardInterrupt:  # Handle Ctrl+C gracefully
    sys.exit()