Load images and randomise on hexgrid

PImage img;  // Declare a variable of type PImage
int x = 0;
int y = 0;
int bigdistance = 2000;
int distance = 100;
int gridpoints = (bigdistance/distance);

void setup() {
  size(2000,2000);
  background(0);
  
}

void draw() {
  
for (int j = 0; j < gridpoints-1; j++){
  
for (int i = 0; i < gridpoints-1; i++){

// Make a new instance of a PImage by loading an image file
int random = int(random(5));

if (random == 0){
  img = loadImage("File 05-08-2018, 21 07 05.png");
} else if (random == 1){
  img = loadImage("Photo 17-06-2018, 15 18 15.png");
} else if (random == 2){
img = loadImage("Photo 08-06-2018, 13 18 17.png");
} else if (random == 3){
img = loadImage("Photo 05-06-2018, 22 14 34.png");
} else if (random == 4){
img = loadImage("File 05-08-2018, 19 43 36.png");
} 

img.resize(140,140);

  // Draw the image to the screen at coordinate (0,0)
  image(img,x,y);
//rect(x,y,10,10);
 
  x += distance;
 
 
}
if ((x % distance) == 0){
x = (distance/2);
} else {
  x = 0;
}
y += distance;

}

    save("hexgrid1.png");
}