/*
Hightechrobo learn
by Arian
*/

#define button 4
#define led 3
bool a = false;
int lastm = 0 ;
int nowm = 0 ;
int b = 0 ;
void setup() {
  // put your setup code here, to run once:
//pinMode(led,OUTPUT);
pinMode(button,INPUT_PULLUP);
}
void loop() {
  // put your main code here, to run repeatedly:
  
  if(digitalRead(button) == 0 and a == 0){
    a = 1;
    lastm = millis();
    b = 255;      
    while(digitalRead(button) == 0){
          analogWrite(led,b);
          nowm = millis();
          if(nowm - lastm > 500)
          {
            lastm = millis();
            b = b - 50 ;              
          }
    if(b <= 0 )
    a = 0 ;        
    }
    }

else if(digitalRead(button) == 0 and a == 1){
  a = 0;
  
    while(digitalRead(button) == 0){
          analogWrite(led,0);
    }
    
    }
    
}