Growing automation

{x}{x}: put X +1/+1 counters on Growing
automation
if there are more than 10 +1/+1 counters on
Growing automation it gains trample
if there are more than 20 +1/+1 counters on
Growing automation it gains double strike
if there are more than 30 +1/+1 counters on
Growing automation it gains infect
Growing automation enters the battlefield with
X +1/+1 counters on it