# Project#3 - Blinking both LEDs when a button is pressed
# Connections:  Add jumpers to the LED headers (Labelled G16BLU and G17RED) to the left of the coin battery.
# Also add jumpers to the GP15 S1 header and GP14 S@ headers to the right of the coin battery socket.
import machine   # Think of "import" as importing a library.  This library allows for us to use GPIOs
import utime     # This "library" allows for us to tell time if connected to the internet, and use delays like 'utime.sleep(1)'
#  This is a new addition to the last piece of code
Button = machine.Pin(15, machine.Pin.IN)  #Setup the SEL1 button pin to GPIO 15.  Set it as an input and name it "Button"
Button2 = machine.Pin(14, machine.Pin.IN)  #Setup the SEL2 button pin to GPIO 14.  Set it as an input and name it "Button2"
#
LEDRED = machine.Pin(16, machine.Pin.OUT)   # Set up GPIO16 as an output, and name it LEDRED
LEDBLU = machine.Pin(17, machine.Pin.OUT)   # Do the same for GPIO17
LEDRED.value(0)   # Turn the red LED off.  If you set it to (1), then you'd be turning it on
LEDBLU.value(0)   # Turn the blue LED off.  If you set it to (1), then you'd be turning it on
while True:            # Loop forever.  We've exchanged our FOR/range with a While loop.  Because the condition is set, the following code will loop forever.
    if Button.value() == 0:  # If during this forever loop we press and hold button#1 (S1), the LEDs will blink while you hold it down.
        LEDRED.value(1)    # Turn the red LED on.  Notice the indent here. This naturally happens after a colon.  It is necessary to compile
        utime.sleep(0.01)  # Wait 10ms (0.01 seconds)
        LEDRED.value(0)    # Turn the red LED off
        utime.sleep(0.01)  # Wait another 0.01 seconds
        LEDBLU.value(1)    # Do the same for the Blue LED
        utime.sleep(0.01)
        LEDBLU.value(0)
        utime.sleep(0.01)
# Challenge:  Add a range (talked about in project#1) that cycles the LEDs 100 times each time the button is pressed.
# While we've added both buttons into the mix within this program, we are only using one.  
# The buttons are held high to 3v through a pull-up resistor, so when you press the button, you see 0v (0)
# 1 = high/3.3v & 0 = low/0v