if(leftMotorSpeed > 0 && rightMotorSpeed > 0 )
{
// set motor speeds using the two motor speed variables above
    set_motors_positive(leftMotorSpeed, rightMotorSpeed);
}
else if ( leftMotorSpeed > 0 && rightMotorSpeed < 0 )
{
set_motors_negative(leftMotorSpeed, rightMotorSpeed);

}


else if ( leftMotorSpeed < 0 && rightMotorSpeed > 0 )
{
set_motors_negative(leftMotorSpeed, rightMotorSpeed);

}

else if ( leftMotorSpeed < 0 && rightMotorSpeed < 0 )
{
   set_motors_negative(leftMotorSpeed, rightMotorSpeed);

}

else
{
set_motors_positive(leftMotorSpeed, rightMotorSpeed);

}