a streamtools pattern that emits an initial condition

initialCondition.json

{"label":"root","blocks":[{"label":"","type":"latch","id":1,"inputs":[{"name":"in","value":null,"type":"any"},{"name":"ctrl","value":null,"type":"boolean"}],"outputs":[{"name":"true","type":"any"},{"name":"false","type":"any"}],"source":null,"position":{"x":366,"y":322}},{"label":"","type":"first","id":2,"inputs":[{"name":"in","value":null,"type":"any"}],"outputs":[{"name":"first","type":"boolean"}],"source":null,"position":{"x":253,"y":383}},{"label":"","type":"identity","id":4,"inputs":[{"name":"in","value":null,"type":"any"}],"outputs":[{"name":"out","type":"any"}],"source":null,"position":{"x":180,"y":296}},{"label":"","type":"identity","id":7,"inputs":[{"name":"in","value":null,"type":"any"}],"outputs":[{"name":"out","type":"any"}],"source":null,"position":{"x":509,"y":314}}],"connections":[{"from":{"id":2,"route":0},"to":{"id":1,"route":1},"id":3},{"from":{"id":4,"route":0},"to":{"id":1,"route":0},"id":5},{"from":{"id":4,"route":0},"to":{"id":2,"route":0},"id":6},{"from":{"id":1,"route":0},"to":{"id":7,"route":0},"id":8}],"groups":[{"id":0,"label":"root","children":[1,2,4,7],"position":{"x":0,"y":0}}],"sources":[],"links":[]}

This emits a value whenever streamtools starts or the graph is reset. Useful for kicking off loops