Imports periph.io/x/periph/conn/spi/spireg periph.io/x/periph/devices periph.io/x/periph/devices/apa102 periph.io/x/periph/host periph.io/x/periph/conn/spi Standard library imports strconv strings time image/jpeg errors flag fmt image image/gif image/png io/ioutil log os path/filepath