Extracting a signal with highest peak values

As shown in the image, I have two signals, one is smaller (blue) and the other is a bigger (red). I found the max peaks for both, and then set a conditional statement to find only peaks of the bigger red signal. Now I was to get rid of this signal entirely, so I only have the blue signal left. How do i do this?

Here's my code

n = length(val);

Ts = 1000;

t = (0:n-1)*Ts;

plot(t, val);

xlabel('Time(seconds)')

ylabel('Amplitude (mVolts)')

title('ECG Signal')

axis tight

hold on

[pk, loc] = findpeaks(val,t);

plot(t, val, loc, pk, 'o')

figure()

n = length(val);

Ts = 1000;

t = (0:n-1)*Ts;

plot(t, val);

xlabel('Time(seconds)')

ylabel('Amplitude (mVolts)')

title('ECG Signal')

axis tight

hold on

minValue = min(val);

val(val < 50) = minValue;

[pk, loc] = findpeaks(val,t);

plot(t, val, loc, pk, 'o')