size(400, 400);
background(245);
fill(20);
textSize(8);

stroke(100);


translate(width/2, height/2);
scale(1, -1);  // flip the y-axis

for (int x=-width/2; x<width/2; x+=10) {
  line(x, -2, x, 2);
}

for (int y=-height/2; y<height/2; y+=10) {
  line(-2, y, 2, y);
}

strokeWeight(4);
stroke(255, 0, 0);
point(130, 30);
strokeWeight(1);
line(130, 30, 0, 0);
pushMatrix();
scale(1, -1);
translate(0, -34 * 2);
text("(130, 30)", 130, 34);
popMatrix();

strokeWeight(4);
stroke(0, 255, 0);
point(40, -120);
strokeWeight(1);
line(40, -120, 0, 0);
pushMatrix();
scale(1, -1);
translate(0, 116 * 2);
text("(40, -120)", 40, -116);
popMatrix();

strokeWeight(4);
stroke(0, 0, 255);
point(-100, 186);
strokeWeight(1);
line(-100, 186, 0, 0);
pushMatrix();
scale(1, -1);
translate(0, -188 * 2);
text("(-100, 190)", -100, 188);
popMatrix();


//save("processing_coordinates_translated.png");