Binary LED Sequence

1//You can use any digital pins you would like to. The four below are just  the ones that i used.
2
3int pin7 = 7;    //Here we are declaring which pins  we will be using in the project 
4int pin6 = 6;         
5int pin5 = 5;
6int  pin4 = 4;
7int TIME = 1000; //Arduino counts up in milliseconds, so I have set  it to where counting sequnce will occur each second. If you want to count faster  just lower this number. If slower, then raise it!
8
9
10void setup() {
11pinMode  (pin7, OUTPUT); //We are stating that these pins will be our outputs. The pins will  carr out a task for each LED
12pinMode (pin6, OUTPUT);
13pinMode (pin5, OUTPUT);
14pinMode  (pin4, OUTPUT);
15
16}
17
18void loop() {
19digitalWrite(pin7, LOW); //Here  we have 0. Notice how all of them are low.
20digitalWrite(pin6, LOW);
21digitalWrite(pin5,  LOW);
22digitalWrite(pin4, LOW);
23delay(TIME);  //The delay just tells the arduino  how long to take before it counts up. The delay is stated above the "void setup".
24
25digitalWrite(pin7,  HIGH); //Here we have 1. Pin7 is the LED I am using on the right most side of my  circuit. 
26digitalWrite(pin6, LOW);
27digitalWrite(pin5, LOW);
28digitalWrite(pin4,  LOW);
29delay(TIME);
30
31digitalWrite(pin7, LOW); //Here we have 2. If you study  the code, you will notice the pattern in highs and lows. 
32digitalWrite(pin6,  HIGH);
33digitalWrite(pin5, LOW);
34digitalWrite(pin4, LOW);
35delay(TIME);
36
37digitalWrite(pin7,  HIGH);
38digitalWrite(pin6, HIGH);
39digitalWrite(pin5, LOW);
40digitalWrite(pin4,  LOW);
41delay(TIME);
42
43digitalWrite(pin7, LOW);
44digitalWrite(pin6, LOW);
45digitalWrite(pin5,  HIGH);
46digitalWrite(pin4, LOW);
47delay(TIME);
48
49digitalWrite(pin7, HIGH);
50digitalWrite(pin6,  LOW);
51digitalWrite(pin5, HIGH);
52digitalWrite(pin4, LOW);
53delay(TIME);
54
55digitalWrite(pin7,  LOW);
56digitalWrite(pin6, HIGH);
57digitalWrite(pin5, HIGH);
58digitalWrite(pin4,  LOW);
59delay(TIME);
60
61digitalWrite(pin7, HIGH);
62digitalWrite(pin6, HIGH);
63digitalWrite(pin5,  HIGH);
64digitalWrite(pin4, LOW);
65delay(TIME);
66
67digitalWrite(pin7, LOW);
68digitalWrite(pin6,  LOW);
69digitalWrite(pin5, LOW);
70digitalWrite(pin4, HIGH);
71delay(TIME);
72
73digitalWrite(pin7,  HIGH);
74digitalWrite(pin6, LOW);
75digitalWrite(pin5, LOW);
76digitalWrite(pin4,  HIGH);
77delay(TIME);
78
79digitalWrite(pin7, LOW);
80digitalWrite(pin6, HIGH);
81digitalWrite(pin5,  LOW);
82digitalWrite(pin4, HIGH);
83delay(TIME);
84
85digitalWrite(pin7, HIGH);
86digitalWrite(pin6,  HIGH);
87digitalWrite(pin5, LOW);
88digitalWrite(pin4, HIGH);
89delay(TIME);
90
91digitalWrite(pin7,  LOW);
92digitalWrite(pin6, LOW);
93digitalWrite(pin5, HIGH);
94digitalWrite(pin4,  HIGH);
95delay(TIME);
96
97digitalWrite(pin7, HIGH);
98digitalWrite(pin6, LOW);
99digitalWrite(pin5,  HIGH);
100digitalWrite(pin4, HIGH);
101delay(TIME);
102
103digitalWrite(pin7, LOW);
104digitalWrite(pin6,  HIGH);
105digitalWrite(pin5, HIGH);
106digitalWrite(pin4, HIGH);
107delay(TIME);
108
109digitalWrite(pin7,  HIGH);
110digitalWrite(pin6, HIGH);
111digitalWrite(pin5, HIGH);
112digitalWrite(pin4,  HIGH);
113delay(TIME);
114
115}