diff --git a/config.go b/config.go
index 54e8178..ffb6bfb 100644
--- a/config.go
+++ b/config.go
@@ -7,6 +7,7 @@ import (
 	"log"
 	"net/url"
 	"os"
+	"sort"
 
 	"slices"
 
@@ -33,7 +34,7 @@ type Data struct {
 }
 
 func newConfig() (Config, error) {
-	dataPoints := envOr("DATA_POINTS", `[[[11, 21], [12, 22]], [[12, 21], [14, 23]]]`)
+	dataPoints := envOr("DATA_POINTS", `[[[11, 21], [12, 22], [12, 21], [14, 23]]]`)
 	dataLabels := envOr("DATA_LABELS", ``)
 	dataWeightRange := envOr("DATA_WEIGHT_RANGE", `20`)
 	dataWeightFloor := envOr("DATA_WEIGHT_FLOOR", `12`)
@@ -194,5 +195,8 @@ func weighXYasZ(input [][]float64) [][]float64 {
 			result = append(result, []float64{x, y, z})
 		}
 	}
+	sort.Slice(result, func(i, j int) bool {
+		return result[i][0] < result[j][0]
+	})
 	return result
 }