Hoping someone can help get me started.

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Hoping someone can help get me started. I’m trying to set up a 60-LED APA102 strip with an Arduino Uno… using pin 11 (SPI) MOSI for DATA and 13 (SPI) SCK for CLK but the LEDs just hold a steady color on random LEDs when I supply 5V to them. Just trying to follow the example on FastLED to turn led[0] red for 1 s then off for 1 s. Code attached. Thanks in advance
https://www.dropbox.com/s/ye3xzwscqy9j0dc/single_strip.ino?dl=0

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Have you tried swapping the clock and data pins? Are the earths for the controller and the leds connected?

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Thanks for responding, I plugged it in tonight with the clock/data switched and it seemed to reset by filling out to a fully lit strip, then I put them back in their correct position and it works