#include <Adafruit_ILI9341.h>
Adafruit_ILI9341 tft(10, 9);


void setup() {
  tft.begin();
}

void loop() {
  int x = 60;
  int y = 80;
  int z = 280;
  for(int i=0; i<=180; i++) {
    double rad = (i*3.14159)/180;
    double dz = x*sin(rad);
    double x1 = x*cos(rad);
    double dy = (y*dz)/(z-dz);

    double y1 = y+dy;
    double y2 = y-dy;

    // tft.drawLine(120,160-y, 120+x1, 160-y1, 0xffff); // Top
    // tft.drawLine(120+x1,160-y1, 120+x1,160+y1, 0xffff); // Right
    // tft.drawLine(120+x1,160+y1, 120,160+y, 0xffff); // Bottom
    // tft.drawLine(120,160+y, 120,160-y, 0xffff); // Left

    tft.drawLine(120-x1,160-y2, 120+x1, 160-y1, 0xffff); // Top
    tft.drawLine(120+x1,160-y1, 120+x1,160+y1, 0xffff); // Right
    tft.drawLine(120+x1,160+y1, 120-x1,160+y2, 0xffff); // Bottom
    tft.drawLine(120-x1,160+y2, 120-x1,160-y2, 0xffff); // Left

    delay(30);

    // tft.drawLine(120,160-y, 120+x1, 160-y1, 0x0); // Top
    // tft.drawLine(120+x1,160-y1, 120+x1,160+y1, 0x0); // Right
    // tft.drawLine(120+x1,160+y1, 120,160+y, 0x0); // Bottom
    // tft.drawLine(120,160+y, 120,160-y, 0x0); // Left

    tft.drawLine(120-x1,160-y2, 120+x1, 160-y1, 0x0); // Top
    tft.drawLine(120+x1,160-y1, 120+x1,160+y1, 0x0); // Right
    tft.drawLine(120+x1,160+y1, 120-x1,160+y2, 0x0); // Bottom
    tft.drawLine(120-x1,160+y2, 120-x1,160-y2, 0x0); // Left

    // tft.fillScreen(0x0);

  }

}