#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int hCenter = 32;                     // horizontal center of 64 / 2 = 32
int Radius = 30;                
const float Pi = 3.14159265359; 

void setup() {
  Serial.begin(9600);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
}

void loop() { 

  display.clearDisplay();
  display.drawRect(0, 0, 120, 64, WHITE); 
  display.drawLine(0,30,120,30,WHITE);    
  display.drawLine(30,0,30,64,WHITE);     
  display.drawLine(60,0,60,64,WHITE);     
  display.drawLine(90,0,90,64,WHITE);     

  for (int i=0; i<120; i++)
  {                                   
    float Angle = i * 3;                                       
    int a = (hCenter + (sin(Angle * (Pi / 180)) * Radius));    
    int b = (hCenter + (cos(Angle * (Pi / 180)) * Radius));    

    display.drawPixel(i,a,WHITE);                              
    display.drawPixel(i,b,WHITE);                              
    display.display();                                         
  }
}