Programming 4 Digit 7 Segment LED Display

1/*
2  Showing number 0-9 on a Common Anode 7-segment LED display
3  Displays the numbers 0-9 on the display, with one second inbetween.
4    A
5   ---
6F |   | B
7  | G |
8   ---
9E |   | C
10  |   |
11   ---
12    D
13  This example code is in the public domain.
14 */
15 
16// Pin 2-8 is connected  to the 7 segments of the display.
17
18int pinA = 2;
19int pinB = 3;
20int pinC  = 4;
21int pinD = 5;
22int pinE = 6;
23int pinF = 7;
24int pinG = 8;
25int  D1 = 9;
26int D2 = 10;
27int D3 = 11;
28int D4 = 12;
29
30// the setup routine  runs once when you press reset:
31void setup() {                
32  // initialize  the digital pins as outputs.
33  pinMode(pinA, OUTPUT);     
34  pinMode(pinB,  OUTPUT);     
35  pinMode(pinC, OUTPUT);     
36  pinMode(pinD, OUTPUT);     
37  pinMode(pinE, OUTPUT);     
38  pinMode(pinF, OUTPUT);     
39  pinMode(pinG,  OUTPUT);   
40  pinMode(D1, OUTPUT);  
41  pinMode(D2, OUTPUT);  
42  pinMode(D3,  OUTPUT);  
43  pinMode(D4, OUTPUT);  
44}
45
46// the loop routine runs over  and over again forever:
47void loop() {
48  digitalWrite(D1, HIGH);
49  digitalWrite(D2,  LOW);
50  digitalWrite(D3, LOW);
51  digitalWrite(D4, LOW); 
52  //0
53  digitalWrite(pinA,  LOW);   
54  digitalWrite(pinB, HIGH);   
55  digitalWrite(pinC, LOW);   
56  digitalWrite(pinD, LOW);   
57  digitalWrite(pinE, HIGH);   
58  digitalWrite(pinF,  LOW);   
59  digitalWrite(pinG, LOW);   
60  delay(1);               // wait for  a second
61  
62  digitalWrite(D1, LOW);
63  digitalWrite(D2, HIGH);
64  digitalWrite(D3,  LOW);
65  digitalWrite(D4, LOW); 
66  //1
67  digitalWrite(pinA, LOW);   
68  digitalWrite(pinB, LOW);   
69  digitalWrite(pinC, LOW);   
70  digitalWrite(pinD,  HIGH);   
71  digitalWrite(pinE, LOW);   
72  digitalWrite(pinF, LOW);   
73  digitalWrite(pinG, LOW);   
74  delay(1);               // wait for a second
75  
76  digitalWrite(D1, LOW);
77  digitalWrite(D2, LOW);
78  digitalWrite(D3,  HIGH);
79  digitalWrite(D4, LOW); 
80  //2
81  digitalWrite(pinA, HIGH);   
82  digitalWrite(pinB, HIGH);   
83  digitalWrite(pinC, LOW);   
84  digitalWrite(pinD,  HIGH);   
85  digitalWrite(pinE, LOW);   
86  digitalWrite(pinF, HIGH);   
87  digitalWrite(pinG, LOW);     
88  delay(1);               // wait for a second
89
90  digitalWrite(D1, LOW);
91  digitalWrite(D2, LOW);
92  digitalWrite(D3, LOW);
93  digitalWrite(D4, HIGH); 
94  //3
95  digitalWrite(pinA, LOW);   
96  digitalWrite(pinB,  HIGH);   
97  digitalWrite(pinC, LOW);   
98  digitalWrite(pinD, HIGH);   
99  digitalWrite(pinE, LOW);   
100  digitalWrite(pinF, LOW);   
101  digitalWrite(pinG,  HIGH);     
102  delay(1);               // wait for a second
103/*  
104  //4
105  digitalWrite(pinA, HIGH);   
106  digitalWrite(pinB, LOW);   
107  digitalWrite(pinC,  LOW);   
108  digitalWrite(pinD, HIGH);   
109  digitalWrite(pinE, HIGH);   
110  digitalWrite(pinF, LOW);   
111  digitalWrite(pinG, LOW);     
112  delay(1000);               // wait for a second
113  
114  //5
115  digitalWrite(pinA, LOW);   
116  digitalWrite(pinB, HIGH);   
117  digitalWrite(pinC, LOW);   
118  digitalWrite(pinD,  LOW);   
119  digitalWrite(pinE, HIGH);   
120  digitalWrite(pinF, LOW);   
121  digitalWrite(pinG, LOW);     
122  delay(1000);               // wait for a second
123  
124  //6
125  digitalWrite(pinA, LOW);   
126  digitalWrite(pinB, HIGH);   
127  digitalWrite(pinC, LOW);   
128  digitalWrite(pinD, LOW);   
129  digitalWrite(pinE,  LOW);   
130  digitalWrite(pinF, LOW);   
131  digitalWrite(pinG, LOW);     
132  delay(1000);               // wait for a second
133  
134  //7
135  digitalWrite(pinA,  LOW);   
136  digitalWrite(pinB, LOW);   
137  digitalWrite(pinC, LOW);   
138  digitalWrite(pinD,  HIGH);   
139  digitalWrite(pinE, HIGH);   
140  digitalWrite(pinF, HIGH);   
141  digitalWrite(pinG, HIGH);     
142  delay(1000);               // wait for a second
143  
144  //8
145  digitalWrite(pinA, LOW);   
146  digitalWrite(pinB, LOW);   
147  digitalWrite(pinC, LOW);   
148  digitalWrite(pinD, LOW);   
149  digitalWrite(pinE,  LOW);   
150  digitalWrite(pinF, LOW);   
151  digitalWrite(pinG, LOW);     
152  delay(1000);               // wait for a second
153
154  //9
155  digitalWrite(pinA,  LOW);   
156  digitalWrite(pinB, LOW);   
157  digitalWrite(pinC, LOW);   
158  digitalWrite(pinD,  HIGH);   
159  digitalWrite(pinE, HIGH);   
160  digitalWrite(pinF, LOW);   
161  digitalWrite(pinG, LOW);     
162  delay(1000);               // wait for a second
163  */
164}