Xiao + Nicola's Arduino Magic

1. change speed of blinks

we programmed ours to blink on for 5 sec, 

off for 1, on for 0.5, off for 10

2. alternate blinks between two lights

one light uses the output at 13, and another at 12

3. count every blink

 we programmed ours to print (to the serial monitor) 
the value of a variable called "count" every time 
is runs through the loop which causes the light to blink