How to make equation for this ?

[anasqiblawi]

so I'm studying Islam and in Islam they say that the **** fire is
red after 1000 years of it's birth
then it became white after 1000 years more
the black after another 1000 years

so as you all know we nowadays can determine the temperature by the glowing color
just like the Stars
and i found that the color of temperature are arranged like this
red , orange , yellow, white , then it go to blue gradients
temperature from 3000k to ∞
were dark blue can be the infinite temperature
i can say they were right about the order of red then white
but i didn't find anything about the black color as you see
maybe black holes , i don't know
i just became interested to find out the temperature of the Islamic **** when it became black fire

so i want to make an equation for that


@
time = 0
temperature = 0k

@
time = 1000
temperature = 3000k

@
time = 2000
temperature = 7000k

@
time = 3000
temperature = ???

@
time = X
temperature = ???
------------------

how can i make an equation were ( x = time )
and when I change the value of x it will give me the tempreture of that time x

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if it's possible to write how you made the equation it w would be better so i can learn to do it by myself next time.

thanks