I'll explain a little how mosaic slip stitch works using the funky flower pattern that is in my logo and in one of my cushions as an example
How to read the chart:-
Each row on the chart represents two rows of knitting, a right side row which is knitted and the following wrong side row which is purled. The right side row, beginning with an odd number at the right hand edge works from right to left. The wrong side row brings the same colour back to the right hand edge of the knitting. The other colour is left at the right hand side of the row waiting to be used later. The mosaic colour work is formed by slipping stitches (purlwise) so that the colour of the previous row is now included on the row you are working on. When slipping the stitches the working yarn should be held to the back of the work.
This is a 14 stitch repeat pattern, with an additional stitch at the beginning and the end of the row. So cast on 2 + (? x 14) stitches using cream yarn.
Try working the chart by following the instructions below
Row 1 : Use pink yarn and leave cream yarn dangling. Work from right to left of the chart Knit 1 *Knit 2, Slip 2, Knit 5, Slip 2, Knit 3;repeat from * to last stitch, Knit 1
Row 2 : Use pink yarn, this row is identical to row 1 but instead of knitting you purl, work from left to right of the chart. Purl 1, * Purl 3 , Slip 2, Purl 5, Slip 2 , Purl 2; repeat from * to last stitch , Purl 1
Row 3 : Use cream yarn and leave pink yarn dangling. Work from right to left of the chart Knit 1 *Slip 1, Knit 3, Slip 1, Knit 1, Slip 1, Knit 1, Slip 1, Knit 3, Slip 2;repeat from * to last stitch, Knit 1
Row 4 : Use cream yarn, this row is identical to row 1 but instead of knitting you purl, work from left to right of the chart. Purl 1, * Slip 2, Knit 3 , Slip 1, Purl 1, Slip 1 , Purl 1, Slip 1, Purl 3 , Slip 1; repeat from * to last stitch, Purl 1
After working a few rows you should find that you can easily just follow the chart.
The full funky flower cushion pattern can be found here. You get 3 patterns in 1 with this one as it also includes the honeypot and leaves mosaic patterns too.