using LTspice to sim a 555 circuit with inductor (how do i)

for my robot i intend to use a 555 timer in astable mode with an inductor included to see if i can alter the frequency by placeing metal near the inductor this is for my robot project does anyone know how i would sim it in LTspice so i can see the best place to put the inductor and get a idea what i can exspect?
i dont have a circuit because first i want to do some sims
many thanks logan
sorry if its not clear but what i am asking is how can i simulate metal near an inductor in LT spice? what does metal near an inductor do regarding frequency? does it make the inductor value smaller or bigger????

The metal near an inductor would change its inductance. You can use the LT Spice model parameter step function to simulate the inductance changing in your circuit. Check out this step tutorial.
https://www.audio-perfection.com/sp...omponent-and-model-parameters-in-ltspice.html

thank you mr mike i will study it and see what i come up with