       leds[leds_index] = CRGB::Black;
     }
   }
+  
   step_counter--;
   // Light up the properly-coloured led in the current position
   leds[step_counter] = moving_colours[colour_counter];
-
-  // take just as long for the first as for the last leds to move out:
-  step_period = 1000/(1+leds_index);
 }
 
 void update(){

    }
    colour_counter--;
    step_counter = leds_index;
    // Turn off the current colour in the current 'source' led
    if(colour_counter==2){
      // moved out blue

void step_led(){
  // First, turn off completely the led at step_counter (the light will leave this spot)
  leds[step_counter] = CRGB::Black;
  // Re-set the step period 'countdown timer'
  step_period = 1000/(1+leds_index);
  
  // Then, check whether we still have steps left on the current led
  if(step_counter==0){
