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// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-09-30 오후 4:49:30
// by Ok-Hyun Park
//
int led1=2,led2=3;
unsigned long time1,time2;
//
void setup(){
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  time1=time2=millis();
}
//
void loop(){
  if(millis()-time1>=1000){ time1=millis(); digitalWrite(led1,!digitalRead(led1)); };  
  if(millis()-time2>=2000){ time2=millis(); digitalWrite(led2,!digitalRead(led2)); };
}