 // leads to a color variable.
 
 void setup() {
-  if (SINGLE_LED) { // CC on pin 7
-    pinMode(7,OUTPUT);
-    pinMode(6,OUTPUT);
-    pinMode(5,OUTPUT);
-    pinMode(4,OUTPUT);
+  if (SINGLE_LED) {
+    pinMode(R_PIN,OUTPUT);
+    pinMode(G_PIN,OUTPUT);
+    pinMode(B_PIN,OUTPUT);
+    pinMode(GND,OUTPUT);
   }
   Serial.begin(BAUDRATE);
   rgb[4]=0;

        Serial.print(buf);
}


  Serial.readStringUntil('\n').toCharArray(input,255);
  if (input!="") { // if connected    
    switch (input[0]) {
      case 'c' : { 
        sClear(); 
        break; 
      }
      case 'B': {
        *rgb[0]=0;
        *rgb[1]=0;
        *rgb[2]=255;
        setOutput(rgb);
        if (SINGLE_LED) { Serial.println(digitalRead(B_PIN)); }
        break;
      }
      case 'b': {
        analogWrite(B_PIN,127.5);
        break;
      }
      case '1': {
