IF Statement Help?

I have a setup with a Potentiometer setup to a servo.

I've now set up 4 LEDs and they are supposed to come on depending on the angle of the servo. I think I have everything right, EXCEPT the IF statemnt. I would really appricate some help. It's supposed to light up one LED from 0-45 degrees, 2 at 45-90, etc.

while(1) %infinite loop, use CTRL+C to end code execution
    potPosition = readVoltage(a,potPin); %measure position of potentiometer
    %use linear interpolation to scale the potentiomenter reading to be between 0 and 1.
    servoPosition = interp1([0 5],[0 1],potPosition);
    writePosition(s,servoPosition); %set position
    CurrentPosition = readPosition(s)*180; %convert position to degrees
    fprintf('Current servo position is %4.1f degrees\n', CurrentPosition);
    pause(1) %pause for one second before checking the potentiometer again
    
     %if angle of servo is X turn on 1 -4 LEDs  
    if CurrentPosition < 45
        writeDigitalPin(a,gPin,1);
        writeDigitalPin(a,rPin,0);
        writeDigitalPin(a,bPin,0);
        writeDigitalPin(a,yPin,0);
      if CurrentPosition < 90 
        writeDigitalPin(a,gPin,1);
        writeDigitalPin(a,rPin,1);
        writeDigitalPin(a,bPin,0);
        writeDigitalPin(a,yPin,0);
      if CurrentPosition < 135 
        writeDigitalPin(a,gPin,1);
        writeDigitalPin(a,rPin,1);
        writeDigitalPin(a,bPin,1);
        writeDigitalPin(a,yPin,0); 
       if CurrentPosition < 180 
        writeDigitalPin(a,gPin,1);
        writeDigitalPin(a,rPin,1);
        writeDigitalPin(a,bPin,1);
        writeDigitalPin(a,yPin,1);
     
      else
        writeDigitalPin(a,gPin,0);
        writeDigitalPin(a,rPin,0);
        writeDigitalPin(a,bPin,0);
        writeDigitalPin(a,yPin,0);
        

Answer 1

[Chris]

This statement would flow like this, for a 30-degree angle (in pseudocode):

if CurrentPosition < 45
    % True, so...
    write([1 0 0 0])
    if CurrentPosition < 90
        % Also true, so...
        write([1 1 0 0])
        if CurrentPosition < 180
            % Still true...
            write([1 1 1 0])
            if etc
        end
    end
end

If CurrentPosiiton > 45, none of this ever triggers.

Try elseif

if CurrentPosition < 45
    % [0-45) degrees?
    write([1 0 0 0])
elseif CurrentPosition < 90
    % if previous wasn't true, [45-90) degrees?
    write([1 1 0 0])
elseif etc...
        
else
    write([0 0 0 0])
end

[Ravyn Schmidt]

Thank you so much ! :)