ElBroka:
I guess that means it is normal and nothing to be worried about.
Thanks.
It is normal. From Spark's website about the Smart Modem: Spark Smart Modem - How to check your modem lights | Spark NZ
"The Wi-Fi/WPS LED should be blue and flashing. This indicates that your devices have connected to your WiFi network and data is being transmitted."
Solid blue and flashing red is when WPS is in progress. What you're seeing is just anything you're uploading or downloading via wifi.