int led1 = 1;
int led2 = 2;
int led3 = 3;
int led4 = 4;
int led5 = 5;
int trigger = digitalRead(6);
void setup(){
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(trigger, INPUT);
 
}
void loop(){
   if(trigger = HIGH)
   {
    digitalWrite(led1, HIGH);//引脚低电平
    digitalWrite(led1,LOW);//引脚高电平
    delay(3000);//延迟1s
    digitalWrite(led2, HIGH);//引脚低电平
    digitalWrite(led2,LOW);//引脚高电平
    delay(3000);//延迟1s
    digitalWrite(led3, HIGH);//引脚低电平
    digitalWrite(led3,LOW);//引脚高电平
    delay(3000);//延迟1s
    digitalWrite(led4, HIGH);//引脚低电平
    digitalWrite(led4,LOW);//引脚高电平
    delay(3000);//延迟1s
    digitalWrite(led5, HIGH);//引脚低电平
    digitalWrite(led5,LOW);//引脚高电平
    delay(3000);//延迟1s
   } 
   if(trigger = LOW ){
       digitalWrite(led1,LOW);
       digitalWrite(led2,LOW);
       digitalWrite(led3,LOW);
       digitalWrite(led4,LOW);
       digitalWrite(led5,LOW);
   }
   
}