Q.Yellow Squash Produced 30 Flowers and Only 4 Veggies
I had planted from seed some yellow squash in February successfully according to my zone. The amount of days until plant bared vegetable was successful. I planted it in a container and saw over 40 flowers and soon had my first yellow squash. After harvesting the first vegetable, the leaves started to wilt and my flowers never produced but 3 more squash. What did I do wrong?

Certified GKH Gardening Expert
This is typical behavior for curbit plants (squash, cucumber, melon). They will produce mostly male (non-fruiting) blossoms early in the season and will gradually start to produce more female blossoms as the season progresses. Give it some time and you will see it start fruiting. Here is how to tell a male from a female blossom: https://www.gardeningknowhow.com/edible/vegetables/squash/female-male-squash-blossoms.htm
This could also be a problem with poor pollination. You may need to lend a hand. The following article should help you: https://www.gardeningknowhow.com/edible/vegetables/squash/pollinate-squash-by-hand.htm