java - I want to design hurdles like used in jetpack joyride -

how can design hurdle pattern going easy tough magical ride(facebook), jetpack joy ride etc. able design separately want more optimize way this.

for(int i=0;i<5;i++) {  for(int j=0;j<i;j++)  {    system.out.println(j);  } } 

this give me triangle shape want more complex design there other way it.

well better approch make 2d array

            int[][] coinmatrix1 =     {                 { 1, 0, 0, 1, 0, 0 },                 { 0, 1, 0, 0, 1, 0 },                 { 0, 0, 1, 0, 0, 1 },                 { 0, 1, 0, 0, 1, 0 },                 { 1, 0, 0, 1, 0, 0 },                 { 0, 0, 0, 0, 0, 0 },     };         generatecoinmatrix(coinmatrix1);   public void generatecoinmatrix(int[][] coinmatrix2) {     (int = 0; < 6; i++)     {         (int j = 0; j < 6; j++)         {             if (coinmatrix2[i][j] == 1)             {                 coin = dummycoinscollection.get(countcoinfromdummy);                 coin.coineffectshow = false; // me                 coin.position.x = coinsetpos.x + j * (coinsizex);                 coin.position.y = coinsetpos.y + (5 - i) * (coinsizex);                 coin.setbounds(coin.position.x, coin.position.y);                 coinmatrix[i][j] = coin;                 countcoinfromdummy++;             }          }     } } 

this way u can make pattern want.