title: erorr on platformIO ide
body: <p>Hello everyone I wrote the following code in platformIO IDE to read a value from the YL-69 module and display it in 7segment, but I got this error:
  error: no 'void SevenSegmentFun::bouncingBall(uint16_t, uint16_t, bool)' member function declared in class 'SevenSegmentFun'</p>
  <pre><code>#include &lt;Arduino.h&gt;
  #include &quot;SevenSegmentTM1637.h&quot;
  
  
  const byte PIN_CLK = 2;   // define CLK pin (any digital pin)
  const byte PIN_DIO = 3;   // define DIO pin (any digital pin)
  SevenSegmentTM1637    display(PIN_CLK, PIN_DIO);
  
  
  void setup() {
    Serial.begin(9600);         
    display.begin();            
    display.setBacklight(100);  
    display.print(&quot;INIT&quot;);      
    delay(1000);   
    display.clear();
    // wait 1000 ms
    pinMode(A0,INPUT);
  };
  
  // run loop (forever)
  void loop() {
     int i=analogRead(A0);
    display.print(i);
    delay(1000);
  };
  </code></pre>
  <p>What is wrong? and How can i fix it?</p>