add function to clear specific point

Author: OmarAli3

src/ArduinoGraphics.cpp

@@ -96,6 +96,11 @@ void ArduinoGraphics::clear()
   }
 }
 
+void ArduinoGraphics::clear(int x, int y)
+{
+  set(x, y, _backgroundR, _backgroundB, _backgroundG);
+}
+
 void ArduinoGraphics::fill(uint8_t r, uint8_t g, uint8_t b)
 {
   _fill = true;

src/ArduinoGraphics.h

@@ -51,6 +51,7 @@ class ArduinoGraphics : public Print {
   void background(uint8_t r, uint8_t g, uint8_t b);
   void background(uint32_t color);
   void clear();
+  void clear(int x, int y); //clear specific point
   void fill(uint8_t r, uint8_t g, uint8_t b);
   void fill(uint32_t color);
   void noFill();