CGRectMake 4 Lines with horizontal displacement for each line?

I have a method:

-(void) generateButtons {
int positionsLeftInRow = BUTTONS_PER_ROW;
int j = 0;

for (int i = 0; i < [self.Model.buttons count]; i++) {
    NSInteger value = ((Model *)self.Model.buttons[i]).value;

    ButtonView *cv = [[ButtonView alloc] initWithFrame:CGRectMake((i % BUTTONS_PER_ROW) * 121 + (i % BUTTONS_PER_ROW) * 40 + 205, j * 122 + j * 40 + 320, 125, 125) andPosition:i andValue:value];

    if (!((Model *)self.Model.buttons[i]).outOfPlay) {
        [self.boardView addSubview:cv];


        if ([self.Model.usedButtons containsObject: self.Model.buttons[i]]) {

            [self.usedButtons addObject: cv];

            [cv flip];

        }
    }

    if (--positionsLeftInRow == 0) {
        j++;
        positionsLeftInRow = BUTTONS_PER_ROW;
    }
}

}

So, my question is, how to make a horizontal displacement for each line, that the second line is displaced from 1st and 3rd for example.