//กำหนดขาของ LED
int ledgreen = 3; 

//กำหนดขาของ digit display
int a=7;   
int b=6; 
int c=5; 
int d=11; 
int e=10; 
int f=8; 
int g=9; 
int dp=4;

 
//display number 1
void display1(void) 
{  
    digitalWrite(b, HIGH);
    digitalWrite(c, HIGH);
}
 
//display number2
void  display2(void) 
{
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(e, HIGH);
    digitalWrite(d, HIGH);
}
  
// display number3
void display3(void) 
{ 
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);    
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);
    digitalWrite(g, HIGH);
} 
// display number4
void display4(void) 
{  
    digitalWrite(f, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
  
} 
// display number5
void display5(void)  
{ 
    digitalWrite(a, HIGH);
    digitalWrite(f, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);
} 
// display number6
void  display6(void) 
{ 
    digitalWrite(a, HIGH);
    digitalWrite(f, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);  
    digitalWrite(e, HIGH);  
} 
// display number7
void display7(void)  
{   
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(c, HIGH);
}  
// display number8
void display8(void) 
{ 
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);  
    digitalWrite(e, HIGH);  
    digitalWrite(f, HIGH);  
} 
void clearDisplay(void) 
{ 
    digitalWrite(a, LOW);
    digitalWrite(b, LOW);
    digitalWrite(g, LOW);
    digitalWrite(c, LOW);
    digitalWrite(d, LOW);  
    digitalWrite(e, LOW);  
  digitalWrite(f, LOW);  
} 
void display9(void)  
{ 
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(g, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);  
    digitalWrite(f, HIGH);  
} 
void display0(void) 
{ 
    digitalWrite(a, HIGH);
    digitalWrite(b, HIGH);
    digitalWrite(c, HIGH);
    digitalWrite(d, HIGH);  
    digitalWrite(e, HIGH);  
    digitalWrite(f, HIGH);  
} 
void setup() 
{ 
    int i;
    for(i=0; i<=11; i++)  
        pinMode(i, OUTPUT);
    
    pinMode(ledgreen, OUTPUT);
}
 
void loop() 
{   
  while(1) 
    {   
        clearDisplay();
        display0(); 
        digitalWrite(ledgreen, 1);
        delay(2000);                       
        clearDisplay();
        display1(); 
        digitalWrite(ledgreen, 0);
        delay(2000);
         display2(); 
        digitalWrite(ledgreen, 1);
        delay(2000);
        clearDisplay();
        display3(); 
        digitalWrite(ledgreen, 0);
        delay(2000);
        clearDisplay();
        display4(); 
        digitalWrite(ledgreen, 1);
        delay(2000);        
        clearDisplay();
        display5(); 
        digitalWrite(ledgreen, 0);
        delay(2000);
        clearDisplay();
        display6(); 
        digitalWrite(ledgreen, 1);
        delay(2000);
        clearDisplay();
        display7(); 
        digitalWrite(ledgreen, 0);
        delay(2000);
        clearDisplay();
        display8(); 
        digitalWrite(ledgreen, 1);
        delay(2000);
        clearDisplay();
        display9(); 
        digitalWrite(ledgreen, 0);
        delay(2000);                    
    }
}