// EME3153   Ex6 Q1
// Student: Alan Lee
// Student ID: 250258181
// Class: 1B  (EG114403)
// wokwi:  https://wokwi.com/projects/447285168126504961

#define LED_Out_Pin 25
#define SW_In_Pin 15

int timea = 0;
int lighta = 0; 
int lighttime = 200; // ms
float lighttype = 0.5; // Range : 0 - 1

void setup()
{
  Serial.begin(115200);

  pinMode(LED_Out_Pin, OUTPUT);
  pinMode(SW_In_Pin, INPUT_PULLUP);
}


void loop()
{
  if (digitalRead(SW_In_Pin))
  {
    digitalWrite(LED_Out_Pin, LOW);
    timea = 0;
    lighta = 1;
  }
  else
  {
    if (lighta == 1) {
      digitalWrite(LED_Out_Pin, HIGH);
    } else if (lighta == 0) {
      digitalWrite(LED_Out_Pin, LOW);
    }
    if ( lighta == 1 && timea >= (lighttime * lighttype)) {
      lighta = 0;
      timea = 0;
    } else if ( lighta == 0 && timea >= (lighttime * (1 - lighttype))) {
      lighta = 1;
      timea = 0;
    }
    timea++;
    delay(1);
  }
}