Flip a virtual coin and show head or tail when the micro:bit is shaken.
The program starts with a rule that uses
a shake event and 2-face dice is cast. The result is stored in variable X.
- when
shake, do 
set variable X to 
random number between 1 and 
3.
- when shake, do play an arpeggio using the music tile
.
The next 2 rules match the value passed in variable X
and display a different symbol for each value, 1 or 2.
- when
variable Xchanges to
1, do 
show head image.
- when variable
Xchanges to
2, do show tail image.
improvement ideas
- clear the screen before showing the new symbol