* @ param r radius

* @ param color Circle color, RGB color with 565 structure

*/

screen.drawCircle(/*x0=*/x, /*y0=*/y, /*r=*/radius, /*color=*/color);

if(x == y ||x == -y ||x == y + 2*radius)

/*

* @ brief Draw a filled circle

* @ param x0 The x-coordinate of the center point

* @ param y0 The y-coordinate of the center point

* @ param r radius

* @ param color Fill color, RGB color with 565 structure

*/

screen.fillCircle(/*x0=*/x, /*y0=*/y, /*r=*/radius, /*color=*/color);

color += 800;

delay(100);

}

}

}

/* Test to draw a triangle */

void testTriangles(uint16_t color){

screen.fillScreen(COLOR_RGB565_BLACK);

for (int16_t i=0; i <=screen.width(); i+=24)

/*

* @ brief Draw a hollow triangle

* @ param x0 The x-coordinate of the start vertex

* @ param y0 The y-coordinate of the start vertex

* @ param x1 The x-coordinate of the second vertex

* @ param y1 The y-coordinate of the second vertex

* @ param x2 The x-coordinate of the third vertex

* @ param y2 The y-coordinate of the third vertex

* @ param color border color, 565 structure RGB color

*/

screen.drawTriangle(/*x0=*/i,/*y0=*/0,/*x1=*/0,/*y1=*/screen.height()-i,/*x2=*/screen.width()-i,/*y2=*/screen.height(), /*color=*/

for (int16_t i=0; i <screen.width(); i+=24)

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