Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

Projects/7 Segment Main/_7_Segment/_7_Segment.ino

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+/*
+Make Projects: How to Drive a 7 Segment LED
+ URL:
+ By: Riley Porter
+ This is an introduction on how to drive a 7 Segment LED using only a Arduino.  This is 
+ not the best way to do this.  This is meant to be a learning excercise.  In later tutorials
+ I will show you how to use an dedicated IC using SPI or a Shift Register.  Enjoy.
+ */
+ 
+ digitalWrite(A, HIGH) = turn off the "A" segment in the LED display
+ digitalWrite(B, LOW)  = turn on the "B" segment in the LED display
+ 
+ 
+
+#define A 8
+#define B 9
+#define C 2
+#define D 3
+#define E 4
+#define F 5
+#define G 6
+
+
+
+
+void clr()
+{
+  //Clears the LED
+  digitalWrite(A, HIGH);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, HIGH);
+  digitalWrite(D, HIGH);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, HIGH);
+  digitalWrite(G, HIGH);
+
+}
+
+
+void char_A()
+{
+  digitalWrite(D, HIGH);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOg9tW);
+}
+z
+void char_B()
+{
+  //Displays B
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, HIGH);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, LOW);
+}
+
+void char_C()
+{
+  //Displays C
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, HIGH);
+  digitalWrite(A, LOW);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, HIGH);
+}
+
+void char_D()
+{
+  //Displays D
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, HIGH);
+  digitalWrite(G, LOW);
+  digitalWrite(A, HIGH);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void char_E()
+{
+  //Displays E
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, HIGH);
+}
+
+void char_F()
+{
+  //Displays F
+  digitalWrite(D, HIGH);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, HIGH);
+}
+
+
+void one()
+{
+  //Displays 1
+  digitalWrite(D, HIGH);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, HIGH);
+  digitalWrite(A, HIGH);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, HIGH);
+}
+
+void two()
+{
+  //Displays 2
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, HIGH);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, HIGH);
+}
+
+void three()
+{
+  //Displays 3
+  digitalWrite(D, LOW);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, HIGH);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void four()
+{
+  //Displays 4
+  digitalWrite(D, HIGH);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, HIGH);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void five()
+{
+  //Displays 5
+  digitalWrite(D, LOW);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, LOW);
+}
+
+void six()
+{
+  //Displays 6
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, HIGH);
+  digitalWrite(C, LOW);
+}
+
+void seven()
+{
+  //Displays 7
+  digitalWrite(D, HIGH);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, HIGH);
+  digitalWrite(G, HIGH);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void eight()
+{
+  //Displays 8
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void nine()
+{
+  //Displays 9
+  digitalWrite(D, LOW);
+  digitalWrite(E, HIGH);
+  digitalWrite(F, LOW);
+  digitalWrite(G, LOW);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void zero()
+{
+  //Displays 0
+  digitalWrite(D, LOW);
+  digitalWrite(E, LOW);
+  digitalWrite(F, LOW);
+  digitalWrite(G, HIGH);
+  digitalWrite(A, LOW);
+  digitalWrite(B, LOW);
+  digitalWrite(C, LOW);
+}
+
+void LoopDisplay()
+{
+  //Loop through all Chars and Numbers
+  char_A();
+  delay(1000);
+  char_B();
+  delay(1000);
+  char_C();
+  delay(1000);
+  char_D();
+  delay(1000);
+  char_E();
+  delay(1000);
+  char_F();
+  delay(1000);
+  one();
+  delay(1000);
+  two();
+  delay(1000);
+  three();
+  delay(1000);
+  four();
+  delay(1000);
+  five();
+  delay(1000);
+  six();
+  delay(1000);
+  seven();
+  delay(1000);
+  eight();
+  delay(1000);
+  nine();
+  delay(1000);
+  zero();
+  delay(1000);
+}
+
+void setup()
+{
+  //Setup our pins
+  pinMode(A, OUTPUT);
+  pinMode(B, OUTPUT);
+  pinMode(C, OUTPUT);
+  pinMode(D, OUTPUT);
+  pinMode(E, OUTPUT);
+  pinMode(F, OUTPUT);
+  pinMode(G, OUTPUT);
+  Serial.begin(9600);  //Begin serial communcation
+
+}
+
+void loop()
+{
+  Serial.println("Starting\n");
+  LoopDisplay();
+
+}