This pattern is made with Treble Cross Stitches. If you didn't meet this technique we recommend you to read: How to Crochet a Treble Cross Stitch.
For an example make chain stitches a multiple of 3, plus 1 chains for the symmetry of the pattern, plus 4 turning chains.
1 row: make 1 treble cross stitch in 5th chain from hook, * 1 treble cross stitch *, 1 treble crochet in last chain;
2 row: 4 turning chain, * 1 treble cross stitch over treble cross stitch of previous row *, 1 treble crochet in last turning chain of previous row.
This pattern repeats from 2nd row.
Pattern Chart Symbols
Chain stitch (ch).
Treble crochet (tr).
Treble Cross Stitch (K-Stitch).
We recommend looking at:
How to Read Crochet Charts
Crochet Chart Symbols and Techniques
In Section Knitting Stitch Patterns
In Section Crochet Stitch Patterns