The blocks light up in various ways. What do they all mean?
We call the flashing light Heartbeat, and it indicates the block is 'alive' and working. When you power up any of the blocks they should show 2 quick bursts of light, follow by almost a second of inactivity. If you don't see this, please check our Troubleshooting guide.
The WiFi block, in addition to the normal heartbeat, has another type of blinking animation; when they are not configured or can't find a wireless network (also called Access Point) to connect to, they will indicate it by flashing in a similar fashion (2 quick bursts of light) but at a higher rate (flashes quicker than the normal heartbeat).