Fading 2 LED groups inversely according to changing Serial input

Other Hardware LEDs and Multiplexing
1

Hi,

First post and first Arduino project ever, so please be patient.

So, I'm trying to make two LED pins to fade in and out inversely - when one LED reaches full power and begins fading out, the other begins to fade in and vice versa.
The trick is - the duration of the fade-in/fade-out is determined by you heart rate, as derived by the PulseSensor controller http://pulsesensor.com.

I've copy-pasted and mixed a bunch of different code snippets trying to make this happen, but I'm pretty sure I'm doing something wrong.

#include <SoftPWM.h>

const int sensePin = 0;
int fadelen=0;

// Hearbeat detect variables
int newHeartReading = 0;
int lastHeartReading = 0;
int Delta = 0;
int recentReadings[8] = {0,0,0,0,0,0,0,0};
int historySize = 8;
int recentTotal = 0;
int readingsIndex = 0;
boolean highChange = false;
int totalThreshold = 2;

// Heartbeat Timing
long lastHeartbeatTime = 0;
long debounceDelay = 150;
int currentHeartrate = 0;

void setup()
{
  SoftPWMBegin();
  SoftPWMSet(9, 0);  
  SoftPWMSet(10, 0);
}



void loop() {
newHeartReading = analogRead(sensePin);
//Calculate Delta
Delta = newHeartReading - lastHeartReading;
lastHeartReading = newHeartReading;
// Find new recent total
recentTotal = recentTotal - recentReadings[readingsIndex] + Delta;
// replace indexed recent value
recentReadings[readingsIndex] = Delta;
// increment index
readingsIndex = (readingsIndex + 1) % historySize;
// Decide whether to start an LED Blink.
if (recentTotal >= totalThreshold) {
// Possible heartbeart, check time
if (millis() - lastHeartbeatTime >= debounceDelay) {
currentHeartrate = 60000 / (millis() - lastHeartbeatTime);
lastHeartbeatTime = millis();
if (currentHeartrate <= 200) { 
  fadelen=(60/currentHeartrate)*3000;
  SoftPWMSetFadeTime(9, fadelen, fadelen);
  SoftPWMSetFadeTime(10, fadelen, fadelen);
  SoftPWMSet(9, 255);
  SoftPWMSet(10, 0);
  delay(fadelen);
  SoftPWMSet(10, 255);
  SoftPWMSet(9, 0);
  delay(fadelen);}
}
}
delay(10); }
2

It is not clear from the link exactly what schematic you are using, and some of that code looks odd.
With only two LEDs why are you using a software PWM? The hardware one would be fine.

Your code needs to calculate a pulse rate and I can't see where it does that.

When posting code you should say what exactly you see it doing, not just say it won't do what you want.