ALL

#include <Servo.h>
#define servo_a_pin 5
#define servo_b_pin 6
#define up 8
#define down 9
#define right 10
#define left 11
Servo servoVert, servoHor;

int x_pos = 0;
int y_pos=0;
int x_step=3;
int y_step=2;


void setup() {
  // put your setup code here, to run once:
  servoVert.attach(servo_a_pin);
  servoHor.attach(servo_b_pin);
  pinMode(up, INPUT_PULLUP);
  pinMode(down, INPUT_PULLUP);
  pinMode(left, INPUT_PULLUP);
  pinMode(right, INPUT_PULLUP);

  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  /*
  servoVert.write(90);
  delay(500);
  servoHor.write(270);
  delay(500);
  servoVert.write(0);
  servoHor.write(0);
  delay(500);
  *//*
  int y_step=2;//y_step
  int x_step=10;
  int del = 25;
  int x_pred = 180;
  int y_pred = 150;

  for (int i=0; i<=x_pred;i=i+x_step){
    servoHor.write(i);

    for (int y=0; y<=y_pred;y=y+y_step){
      Serial.print(i);
      servoVert.write(y);
      Serial.print("||");
      Serial.println(y);
      delay(del);
    }
    for (int y=y_pred; y>=0;y=y-y_step){
      Serial.print(i);
      servoVert.write(y);
      Serial.print("||");
      Serial.println(y);
      delay(del);
    }
  }
    for (int i=x_pred; i>=0;i=i-x_step){
    servoHor.write(i);
    for (int y=0; y<=y_pred;y=y+y_step){
      Serial.print(i);
      servoVert.write(y);
      Serial.print("||");
      Serial.println(y);
      delay(del);
    }
    for (int y=y_pred; y>=0;y=y-y_step){
      Serial.print(i);
      servoVert.write(y);
      Serial.print("||");
      Serial.println(y);
      delay(del);
    }
  }*/


  int upVal = digitalRead(up);
  int downVal = digitalRead(down);
  int leftVal = digitalRead(left);
  int rightVal = digitalRead(right);
  Serial.print(upVal);
  Serial.print("||");
  Serial.print(downVal);
  Serial.print("||");
  Serial.print(leftVal);
  Serial.print("||");
  Serial.println(rightVal);
  if (upVal==LOW){
    y_pos-=y_step;
  }
  if (downVal==LOW){
    y_pos+=y_step;
  }
  if (rightVal==LOW){
    x_pos+=x_step;
  }
  if (leftVal==LOW){
    x_pos-=x_step;
  }

  if (y_pos<0){y_pos=0;}
  if (x_pos<0){x_pos=0;}
  if (y_pos>180){y_pos=180;}
  if (x_pos>180){x_pos=180;}

  servoVert.write(y_pos);
  servoHor.write(x_pos);
}