MultiTask LED Blink2

#define LED1 2
#define LED2 4
#define LED3 6
#define delay1 100
#define delay2 200
#define delay3 300
int state1=0,state2=0,state3=0;
unsigned long timer1,timer2,timer3;
void setup(){
 pinMode(LED1,OUTPUT);
 pinMode(LED2,OUTPUT);
 pinMode(LED3,OUTPUT);
 timer1=millis();
 timer2=millis();
 timer3=millis();
}
void loop(){
 if((millis()-timer1)>delay1){
   if(state1==0){
     digitalWrite(LED1,HIGH);
     state1=1;
   }
   else{
     digitalWrite(LED1,LOW);
     state1=0;
   }
    timer1=millis();
 }
 if((millis()-timer2)>delay2){
   if(state2==0){
     digitalWrite(LED2,HIGH);
     state2=1;
   }
   else{
     digitalWrite(LED2,LOW);
     state2=0;
   }
    timer2=millis();
 }
 if((millis()-timer3)>delay3){
   if(state3==0){
     digitalWrite(LED3,HIGH);
     state3=1;
   }
   else{
     digitalWrite(LED3,LOW);
     state3=0;
   }
    timer3=millis();
 }
}