public void randomLevel() {
		Random rand = new Random(System.currentTimeMillis());
		numitems = 0;
		for(int i=0;i<map.length;i++) {
			for(int j=0;j<map.length;j++) {
				int val = rand.nextInt(21);
				if(val=<2 && numitems >40)		//For very few tiles, draw a floor with a Poison
					map[i][j] = new Floor(i,j, new Poison());
				if(val<4 && val>2) 						//for 20% of tiles, draw a wall
					map[i][j] = new Wall(i,j);
				if(val>=4 && val<=17)			//for most tiles, draw a floor without an item
					map[i][j] = new Floor(i,j,null);
				if(val>17 && val<20) { 			//For several tiles, draw a floor with a Gem
					map[i][j] = new Floor(i,j, new Gem());
					numitems++;
				}
				if(val==20) {					//For a few tiles, draw a floor with a Diamond
					map[i][j] = new Floor(i,j, new Diamond());
					numitems++;
				}

			}
		}
	}