VarSpeedServo - a modified Servo library with speed control

Using Arduino Motors, Mechanics, Power and CNC
5

Hi there,

Looks like this library would be the solution to my problem.
So I downloaded the library, installed it and created the following code:

#include <VarSpeedServo.h>

VarSpeedServo servo1; 
VarSpeedServo servo2;

void setup() {
  servo1.attach(9);  
  servo2.attach(10);

  Serial.begin(19200);
  Serial.println("Ready");
}

void loop() {

  static int v = 0;

  if ( Serial.available()) {
    char ch = Serial.read();

    switch(ch) {
	case '0'...'9':
	  v = v * 10 + ch - '0';
	  break;
	case 'R':
	  servo1.slowmove(v,50);
	  v = 0;
	  break;
	case 'L':
	  servo2.write(v);
	  v = 0;

	  break;
        case 'Z':
          servo1.write(90);
          servo2.write(90);
          break;
        
    }
  }
}

But it gives the following error when compiling:

cameraCodeArduino.cpp.o: In function `__static_initialization_and_destruction_0':
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:6: undefined reference to `VarSpeedServo::VarSpeedServo()'
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:7: undefined reference to `VarSpeedServo::VarSpeedServo()'
cameraCodeArduino.cpp.o: In function `loop':
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:29: undefined reference to `VarSpeedServo::slowmove(int, unsigned char)'
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:33: undefined reference to `VarSpeedServo::write(int)'
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:38: undefined reference to `VarSpeedServo::write(int)'
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:39: undefined reference to `VarSpeedServo::write(int)'
cameraCodeArduino.cpp.o: In function `setup':
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:10: undefined reference to `VarSpeedServo::attach(int)'
C:\Users\s070099\AppData\Local\Temp\build7343566564887365634.tmp/cameraCodeArduino.cpp:11: undefined reference to `VarSpeedServo::attach(int)'

I have no idea how to solve this, do you have any idea what's going wrong here?

Thanks in advance