To do this, some more information is needed.
1. What type of laser. (Specifications would be nice) and a link to see what kind of hardware we are dealing with)
2. I`m not shure if there are any laws and regulations in Australia regarding outdoor public use of lasers, but there probably are, and you will need to do there proper paperworks.
3. Post an example of the logo you want to use. The complexity of the logo will quickly tell us ig it is possible to do with your laser.
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More projects than time available.
More projects started than finished.
More money spent than earned.
More failure than success.
Just got to love lasers!