Touching point

Try changing the parameter $\pink{t}$start color #ff00af, t, end color #ff00af and $\purple{s}$start color #9d38bd, s, end color #9d38bd below. Pay attention to the position of point $\green{P}$start color #28ae7b, P, end color #28ae7b.

What values of $\purple{s}$start color #9d38bd, s, end color #9d38bd and $\pink{t}$start color #ff00af, t, end color #ff00af cause $\green{P}$start color #28ae7b, P, end color #28ae7b to lie exactly on top of point $A?$A, question mark