Left panels: GLS periodograms for the WASP-69 data in B and V bands from the 2016 observing season. Horizontal lines indicate false-alarm probability levels FAP = 0.1, 0.01, and 0.001. Right panels: Light curves folded to the best periods, as noted in the plots. A sine wave for the best periods is fitted to the data. The blue and green colors show one complete cycle in B and V filters, respectively.