New to Lilypond, how do i change the left hand clef from bass clef to treble clef right at the beginning of the piece?

[tripleamia]

<http://lilypond.1069038.n5.nabble.com/file/t5705/Opera_Snapshot_2018-09-18_175428_conquest.png>
I'm working in Frescobaldi, so I have the right hand and left hand, and for
the first two measures of the left hand I need to switch from bass to treble
before any notes. I'm having difficulty explaining but you see in the
picture what I'm trying to do. What is the least complicated way to do this?



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