const int SpwmArry[] =
 {500,500,750,500,1250,500,2000,500,1250,500,750,500,500}; // Array of SPWM values.
const int SpwmArryValues = 13; //Put length of an Array depends on SpwmArray numbers.

// Declare the output pins and choose PWM pins only
const int sPWMpin1 = 10;
const int sPWMpin2 = 9;

// enabling bool status of Spwm pins
bool sPWMpin1Status = true;
bool sPWMpin2Status = true;

void setup(){
  pinMode(sPWMpin1, OUTPUT);
  pinMode(sPWMpin2, OUTPUT);
}

void loop(){

// Loop for Spwm pin 1
for(int i(0); i != SpwmArryValues; i++)
   {
     if(sPWMpin1Status)
     {
       digitalWrite(sPWMpin1, HIGH);
       delayMicroseconds(SpwmArry[i]);
       sPWMpin1Status = false;
     }
     else
     {
       digitalWrite(sPWMpin1, LOW);
       delayMicroseconds(SpwmArry[i]);
       sPWMpin1Status = true;
     }
   }

// Loop for Spwm pin 2
for(int i(0); i != SpwmArryValues; i++)
{
   if(sPWMpin2Status)
   {
     digitalWrite(sPWMpin2, HIGH);
     delayMicroseconds(SpwmArry[i]);
     sPWMpin2Status = false;
   }
   else
   {
    digitalWrite(sPWMpin2, LOW);
    delayMicroseconds(SpwmArry[i]);
    sPWMpin2Status = true;
  }
 }
}