1st year anniversary

Today is my father's first year passing anniversary. Just 3.5 hrs from now, is the time I found my father laying motionless at the kitchen entrance. Helplessly, I went to call for my sister and mother, then 911 for the ambulance. Trying very hard to resuscitate him. I know he tried to make be notice his fall that time by making some noises knocking the chairs beside him but it took me a while to react to find out what is happening in the kitchen. I regret for being too late for him.