screen.drawRoundRect(/*x0=*/x, /*y0=*/y, /*w=*/w, /*h=*/h, /*radius=*/20, /*color=*/color);

x+=5;

y+=5;

w-=10;

h-=10;

color+=0x0100;

delay(50);

}

for(i = 0 ; i <= 16; i+=2) {

/*

* @ brief Draw a filled and rounded rectangle

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

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

* @ param w horizontal side length

* @ param h longitudinal side length

* @ param radius Round corner radius

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

*/

screen.fillRoundRect(/*x0=*/x, /*y0=*/y, /*w=*/w, /*h=*/h, /*radius=*/10, /*color=*/color);

x+=5;

y+=5;

w-=10;

h-=10;

color+=0x0500;

delay(50);

}

}

/* Test to draw a circle */

void testCircles(uint8_t radius, uint16_t color) {

screen.fillScreen(COLOR_RGB565_BLACK);

for (int16_t x=radius; x <=screen.width()-radius; x+=radius*2) {

for (int16_t y=radius; y <=screen.height()-radius; y+=radius*2) {

/*

* @ brief Draw a hollow circle

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

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

* @

di