int pb=5;
int led=9;
int botton_state;
int ledstate;
int lastbotton_state;
void setup() {
  // put your setup code here, to run once:
pinMode(pb, INPUT_PULLUP);
pinMode(led, OUTPUT);
botton_state=digitalRead(pb);
}


void loop() {
  // put your main code here, to run repeatedly:
  lastbotton_state=botton_state;
botton_state = digitalRead(pb);
ledstate =digitalRead(led);
int LED =!ledstate;
if((!botton_state) &&(lastbotton_state)){
  
  digitalWrite(led,LED);
//delay(300);
}



}