#include <IRremote.h>
#define upi 0x10FED22D
#define upd 0x10FE50AF
#define Stop 0x10FEB04F
#define downi 0x10FE30CF
#define downd 0x10FE926D
int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;
int outPin1 = 9;
int outPin2 = 10;
int outPin3 = 5;
int outPin4 = 6;
int i=0,j=0,a=0,b=0,c=0,d=0;
void setup()
{
Serial.begin(9600); 
pinMode(outPin1, OUTPUT);
pinMode(outPin2, OUTPUT);
pinMode(outPin3, OUTPUT);
pinMode(outPin4, OUTPUT);
irrecv.enableIRIn(); 
}
void loop()
{
if (irrecv.decode(&results))
{
irrecv.resume();
if(results.value== upi){
delay(30);
if(a>=1){
  i+=5;
   }
Serial.println(i);
digitalWrite(outPin2, LOW);
digitalWrite(outPin4, LOW);
Serial.println("increase speed forwards");
   a++;
if(i>250){
   i=250;
}
if(j<=250 && j>=0){
  j=0;
  c=0;
}
analogWrite(outPin1,i);
delay(100);
analogWrite(outPin3,i);
}
if(results.value== upd){
delay(30);
Serial.println(i);
if(b>=1){
  i-=5;
  }
digitalWrite(outPin2, LOW);
digitalWrite(outPin4, LOW);
Serial.println("decrease speed forwards");
   b++;
if(i<0 ){
   i=0;
}
analogWrite(outPin1,i);
delay(100);
analogWrite(outPin3,i);
}
if(results.value== downi){
delay(30);
if(c>=1){
   j+=5;
  }
Serial.println(j);
digitalWrite(outPin1, LOW);
digitalWrite(outPin3, LOW);
Serial.println("increase speed backwards");
   c++;
if(j>250){
   j=250;
}
if(i<=250 && i>=0){
  i=0;
  a=0;
}
analogWrite(outPin2,j);
delay(100);
analogWrite(outPin4,j);
}
if(results.value== downd){
delay(30);
Serial.println(j);
if(d>=1){
  j-=5;
  }
digitalWrite(outPin1, LOW);
digitalWrite(outPin3, LOW);
Serial.println("decrease speed backwards");
  d++;
if(j<0){
  j=0;
}
analogWrite(outPin2,j);
delay(100);
analogWrite(outPin4,j);
}
if(results.value== Stop){
delay(30);
  i=0;
  j=0;
digitalWrite(outPin1, LOW);
digitalWrite(outPin2,LOW);
digitalWrite(outPin3, LOW);
digitalWrite(outPin4,LOW);
Serial.println("Stop");
}
}
}