Random and If Else help

Processing Coding Questions
2

My original approach was more simple in that I set the float values for the coordinates I wanted as:

  float x1 = random(0,width/1.8);
  float y1 = random(0,height/2.46);
  float x2 = random(0,width/1.8);
  float y2 = random(0,height/2.46);

(allowing them to extend past the boundary of the quadrant, not important)

which would be used to draw:

stroke(0);
//upper left
line(x1,y1,x2,y1);
line(x2,y1,x2,y2);
line(x2,y2,x1,y2);
line(x1,y2,x1,y1);

and was looking for a way to say if(x1>= width/4)&&(y1>=height/4) DO NOTHING. Is that a thing? Maybe I make the drawing a class? And if that statement evaluates to true, skip the drawing? If it evaluates to false, do the drawing?

Sorry if this is super confusing. Let me know if there is other info I should be providing.

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