Cycle all leds on Logitech g710+ keyboard (demo: https://www.youtube.com/watch?v=XGil25Uhe_o)

g710+-leds.php

<?php

while (true) {
  for ($wasd = 0; $wasd < 5; $wasd++) {
    for ($other = 0; $other < 5; $other++) {
      file_put_contents('/sys/bus/hid/devices/0003:046D:C24D.0002/logitech-g710/led_keys', $wasd << 4 | $other);
      usleep(100000);
    }
  }

  for ($i = 0; $i < 16; $i++) {
    file_put_contents('/sys/bus/hid/devices/0003:046D:C24D.0002/logitech-g710/led_macro', $i);
    usleep(100000);
  }
}