create looping background in cocos2D

gistfile1.m

-(id) init
{
    if( (self=[super init] )) {
        CGSize size = [[CCDirector sharedDirector] winSize];

        CCTexture2D *bg = [[CCTexture2D alloc] initWithImage:[UIImage imageNamed:@"Default.png"]];
        CCSprite *staticBackground0 = [CCSprite spriteWithTexture:bg];
        staticBackground0.position = ccp(-size.width/2,size.height/2);
        CCSprite *staticBackground1 = [CCSprite spriteWithTexture:bg];
        staticBackground1.position = ccp(size.width/2,size.height/2);

        CCSprite *staticBackground = [[CCSprite alloc] init];
        [staticBackground addChild:staticBackground0];
        [staticBackground addChild:staticBackground1];
        [self addChild:staticBackground];

        id a1 = [CCMoveBy actionWithDuration:3.0f position:ccp(size.width,0)];
        id a2 = [CCPlace actionWithPosition:ccp(0,0)];
        id seq = [CCSequence actions:a1,a2, nil];
        [staticBackground runAction:[CCRepeatForever actionWithAction: seq]];
    }
    return self;
}