int Pin_pot = A0;
int pot = 0;
int Led_R = 9;
int Led_G = 10;
int Led_B = 11;

void setup() {
pinMode(Led_R, OUTPUT);
pinMode(Led_G, OUTPUT);
pinMode(Led_B, OUTPUT);
pinMode(Pin_pot, INPUT);
}
void loop() {
 pot= map(analogRead(Pin_pot ),0,1023,1,7);

 if(pot==1){
  analogWrite(Led_R,255);
  analogWrite(Led_G,0);
  analogWrite(Led_B,0);
 }
if(pot==2){
  analogWrite(Led_R,255);
  analogWrite(Led_G,100);
  analogWrite(Led_B,0);
 }
if(pot==3){
  analogWrite(Led_R,255);
  analogWrite(Led_G,255);
  analogWrite(Led_B,0);
 }
if(pot==4){
  analogWrite(Led_R,0);
  analogWrite(Led_G,255);
  analogWrite(Led_B,0);
 }
if(pot==5){
  analogWrite(Led_R,0);
  analogWrite(Led_G,0);
  analogWrite(Led_B,255);
 }
if(pot==6){
  analogWrite(Led_R,75);
  analogWrite(Led_G,0);
  analogWrite(Led_B,130);
 }
if(pot==7){
  analogWrite(Led_R,255);
  analogWrite(Led_G,0);
  analogWrite(Led_B,255);
 }

}