How do you change the Tempo automatically?

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Hi! I was wondering if someone could help me figure out how to change the Tempo automatically. I'm doing a mix with some of Kingdom Heart's soundtrack and I want the tempo to speed up.

The first part is Hollow Bastion:

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The second part will be Scherzo Di Notte:

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Just before Scherzo Di Notte Starts, I want the tempo to speed up automatically, how would one do that?
Just drag the bpm-gadget into an automation track, and set a linear-progression curve. This can be a bit 'tricky' to get right, but if you avoid too steep curve-changes, then it will work.
Wooah, you're definitely busy with music. :)
Just as musikbear said, use the automation feature in Lmms.