The Alapin Variation is considered to be anti-scillian. Its starts with 2.c3. This second move prepares white to attack on D4.
In the image to the left, you can see that white's idea to push the D3 to pawn to D4. The Sicilian generally give black two center pawn, but if White plays the Alapin variations and pushed d4, then it will end up with 2 center pawns unlike the usual, 1.
Follow up moves include: 2...Nf6, D5, e6 and D6. These are the most common follow up moves for black.