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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

int coy, x = 0;
int vcoy = 1;
bool showtext = true;
int textttl = 20;

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  if(!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }
}

void loop() {
  oled.clearDisplay();
  oled.setTextColor(WHITE);
  if(showtext) {
    textttl = textttl - 1;
    oled.setCursor(0, 0);
    oled.println("screensaver made by d");
    oled.setCursor(0, 32);
    oled.println("special thanks to    maybe_cube");
    if(textttl == 0) {
      showtext = false;
    }
  } else {
    for (int i = 0; i<4;i++ ){
      oled.drawLine(0, 30+i*10, 128, 30+i*10, WHITE);
    }
    for (int i = 0; i<9; i++) {
      oled.drawLine((i*15)+x, 30, ((i*15)+x)*2-64, 64, WHITE);
    }
    for (int i = 0; i<5; i++) {
      oled.fillRect((rand() % 128), (rand() % 30), 2, 2,WHITE);
    }
    oled.fillCircle(64,22+coy, 10,INVERSE);
    if (x % 5 == 0) vcoy = vcoy * -1;
    coy = coy + vcoy;
    x %= 15;
    x++;
  }
  oled.display();
  delay(50);
}