This puddle can be customised to suit your needs. VERY easy to derive, if you are a new developer, this is something good to start with.

It's mean to be the ... waste liquid that... comes out of... pipes and drainage holes... as you can tell in the picture

Just a puddle.

Please find the following texture base and alpha map for your use.

It's recommanded that you do not change the settings unless you know what they do.

Hint: Change saturation of the base puddle colour to get the colour you need,
Darken the alpha map to INCREASE transparency of your puddle, and
Brighten the alpha map to DECREASE transparency of your puddle.

Puddle Colour
Adjust the colour of this image to get the colour of your want, eg Yellow.

SOLID
Use this alphamap if you want to archive a sticky goo look with no transparency. (Remember to resize it to 128x128)

TRANSCULENT
Use this alphamap if you want to archive a semi-transparent liquid look, like the original.