CAKeyframeAnimation repeat after a delay - iphone

Question

I have 3 uiviews which have a CAKeyframeAnimation layer added to them to bounce. Currently i add these to each uiview after a delay and set them to repeat.
What i need them to do is repeat but after a delay. so view 1 animates, but waits till after view 2 and 3 have animated before starting again.
I can't seem to read anywhere in the docs that mention repeating a CAKeyframeAnimation with a repeat start time delay.
Can anyone think of an idea to get the delays between the views?
Thanks
Dan
Code so far:
- (CAKeyframeAnimation *)jumpAnimation
{
// these three values are subject to experimentation
CGFloat initialMomentum = 80.0f; // positive is upwards, per sec
CGFloat gravityConstant = 250.0f; // downwards pull per sec
CGFloat dampeningFactorPerBounce = 0.6; // percent of rebound
// internal values for the calculation
CGFloat momentum = initialMomentum; // momentum starts with initial value
CGFloat positionOffset = 0; // we begin at the original position
CGFloat slicesPerSecond = 60.0f; // how many values per second to calculate
CGFloat lowerMomentumCutoff = 5.0f; // below this upward momentum animation ends
CGFloat duration = 0;
NSMutableArray *values = [NSMutableArray array];
do
{
duration += 1.0f/slicesPerSecond;
positionOffset+=momentum/slicesPerSecond;
if (positionOffset<0)
{
positionOffset=0;
momentum=-momentum*dampeningFactorPerBounce;
}
// gravity pulls the momentum down
momentum -= gravityConstant/slicesPerSecond;
CATransform3D transform = CATransform3DMakeTranslation(0, -positionOffset, 0);
[values addObject:[NSValue valueWithCATransform3D:transform]];
} while (!(positionOffset==0 && momentum < lowerMomentumCutoff));
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:#"transform"];
animation.duration = duration;
animation.fillMode = kCAFillModeForwards;
animation.values = values;
animation.repeatCount = HUGE_VAL;
animation.delegate =self;
animation.autoreverses = YES;
return animation;
}