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The SPI bus is not enabled by default by Raspbian.
To enable it you can follow the next steps.
First, open raspi-config.
Then navigate the interface to activate the SPI bus. Go to advanced options.
Verify that SPI has been enabled.
Now you can exit raspi-config and SPI will be permanently enabled.
This allows you to play with the [Everloop LED Array And IMU](Everloop LED Array And IMU).