First blot gently in the area of the spillage. Do not press down as this will push the stain further into the fibres.
Try to use absorbent cloths and keep changing them as you remove more of the stain. Take your time.
Once you have most of the liquid out, start to gently rub back and forth over the stain but do not press down. Remember you don’t want to spread the stain keep rubbing very gently changing the cloth as it absorbs more of the stain. The more time you take the gentler you are the less damage down.
To remove the stain completely call a professional carpet cleaner as soon as possible.