Draw Pixels in a square from inside out - Java -

i want draw square of pixels pending on how many items in array. square represents array amount small squares represent small arrays , large squares represent large arrays. finding difficult conceptualize how go this?

edit: using java 2d.

the spiral starts @ 1 , advances anti-clockwise towards outside of square (i.e. 2,3,4,5 etc). each square can represented amount of data square represents.

public class test {      enum direction {         right,         up,         left,         down     }      public static void main(string... args) throws ioexception {          bufferedimage image = new bufferedimage(100, 100, bufferedimage.type_int_argb);          int rgb = color.black.getrgb();          point p = new point(50, 50);         direction d = direction.right;         int currentsegmentlength = 1;           (int = 0; < 100; += 2) {              paintsegment(image, rgb, p, d, currentsegmentlength);             d = nextsegmentdirection(d);              paintsegment(image, rgb, p, d, currentsegmentlength);             d = nextsegmentdirection(d);              currentsegmentlength++;         }           imageio.write(image, "png", new file("test.png"));     }      private static void paintsegment(bufferedimage image, int rgb, point p,             direction d, int currentsegmentlength) {          (int s = 0; s < currentsegmentlength; s++) {             image.setrgb(p.x, p.y, rgb);              switch (d) {             case right: p.x++; break;             case up:    p.y--; break;             case left:  p.x--; break;             case down:  p.y++; break;             }         }     }      private static direction nextsegmentdirection(direction d) {         switch (d) {         case right: return direction.up;         case up:    return direction.left;         case left:  return direction.down;         case down:  return direction.right;          default: throw new runtimeexception("never here");         }     } }