#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
int X_axis=23;
int a;
float b;
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3c
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,&Wire, OLED_RESET);

int ball_x=63;
int ball_y=31;
int ball_radius=2;
int ball_speed_x=1;
int ball_speed_y=1;





void setup() {
  Serial.begin(115200);
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);}

pinMode(34,INPUT);


}

void loop() {
a=analogRead(34);
if (a!=0 && a>2047.5){
b= a*128/4095;
}
if (a!=0 && a<2047.5){
b= a*128/4095 +20 ;
}
if (a==0){
b=20;
}
ball_x=ball_x+ball_speed_x;
ball_y=ball_y+ball_speed_y;
display.clearDisplay();
display.fillRect(b-20,60,20,5,WHITE);
if (ball_y-ball_radius <= 0 ){
  ball_speed_y= - ball_speed_y;
}

if (ball_x-ball_radius <=0 || ball_x+ball_radius >=128){
  ball_speed_x=- ball_speed_x;
}

if (b-20<= ball_x && ball_x <=b && ball_y==60 ){
  ball_speed_y = -ball_speed_y;
}

display.fillCircle(ball_x,ball_y,ball_radius,WHITE);
display.display();
delay(20);


}








2ND CODE
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
int k1;
int k2;
int x1=64;
int z1=32;
int x_speed=1;
int z_speed=1;
int score=0;
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for SSD1306 display connected using I2C
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
int x=55;
int y=60;

void setup()
{ pinMode(16,INPUT);
  pinMode(15,INPUT);
  pinMode(18,OUTPUT);
  Serial.begin(9600);
  
  // initialize the OLED object
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  display.clearDisplay();


}
void loop(){

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor( 115, 1);
  display.print(score);

  
  
  k1=digitalRead(16);
  if(k1==0 && x+20<=127){
    x=x+3;
    
 }
  k2=digitalRead(15);
  if(k2==0 && x>=0){
    x=x-3;
    
  }
  if(2<x1<125 && 0<z1){
    x_speed=x_speed;
    z_speed=z_speed;
    
  }
  if(x<=x1 && x1<=x+20 && z1+2==59){
    z_speed=-z_speed;
    x_speed=x_speed;
    score=score+1;
    digitalWrite(18,HIGH);
    delay(20);
    digitalWrite(18,LOW);
    
  }

  if(x1==125 || x1==2){
    x_speed=-x_speed;
    z_speed=z_speed;
  }

  if(z1==2 ){
    z_speed=-z_speed;
    x_speed=x_speed;
  }
  x1=x1+x_speed;
  z1=z1+z_speed;
  display.fillCircle(x1, z1 , 2 ,WHITE);
  display.fillRect(x,y,20,4, WHITE);
  display.display();

  display.clearDisplay();
  if(z1==61){
    digitalWrite(18,HIGH);
    delay(1000);
    digitalWrite(18,LOW);
  }
  while(z1==61){
    display.clearDisplay();
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor( 25,25);
    display.print("score ");
    display.print(score);
    display.display();

  }

  //if(x_speed<0){
    //x_speed=x_speed-score;
  //}
  //if(x_speed>0){
    //x_speed=x_speed+score;
  //}
  //if(z_speed<0){
  //  z_speed=z_speed-score;
  //}
  //if(z_speed>0){
   // z_speed=z_speed+score;
  //}
 
}