diff --git a/internal/captcha/dwelling_captcha.go b/internal/captcha/dwelling_captcha.go
index a5eb7d0..e2df229 100644
--- a/internal/captcha/dwelling_captcha.go
+++ b/internal/captcha/dwelling_captcha.go
@@ -1,10 +1,9 @@
 package captcha
 
 import (
-	"crypto/rand"
 	"image"
 	"justcaptcha/pkg/captcha"
-	"math/big"
+	"math/rand"
 	"time"
 
 	"github.com/fogleman/gg"
@@ -47,30 +46,28 @@ func (c *DwellingCaptcha) generateImage(style string) *image.Image {
 	ctx.DrawStringAnchored(string(c.GetAnswer()), 20, 5, .5, .5)
 
 	// draw lines and points
+	h := float64(ctx.Height())
 
-	ctx.SetRGB255(0x9f, 0x2b, 0x68)
-	for i := 0; i < 16; i++ {
-		x0, _ := rand.Int(rand.Reader, big.NewInt(int64(ctx.Height())))
-		x1, _ := rand.Int(rand.Reader, big.NewInt(int64(ctx.Height())))
-		r, _ := rand.Int(rand.Reader, big.NewInt(int64(4)))
-		ctx.SetLineWidth(2)
-		ctx.DrawPoint(float64(x0.Int64()), float64(x1.Int64()), float64(r.Int64()))
-		ctx.DrawLine(float64(x0.Int64()), 0, float64(ctx.Height()), float64(x1.Int64()))
-		ctx.Stroke()
-	}
-
-	for i := 0; i < 16; i++ {
-		x0, _ := rand.Int(rand.Reader, big.NewInt(int64(ctx.Height())))
-		x1, _ := rand.Int(rand.Reader, big.NewInt(int64(ctx.Height())))
-		r, _ := rand.Int(rand.Reader, big.NewInt(int64(4)))
-		ctx.SetLineWidth(2)
-		ctx.DrawPoint(float64(x0.Int64()), float64(x1.Int64()), float64(r.Int64()))
-		ctx.DrawLine(0, float64(x0.Int64()), float64(x1.Int64()), float64(ctx.Height()))
+	for i := 0; i < 24; i++ {
+		x0 := rand.Float64() * h
+		x1 := rand.Float64() * h
+		x2 := rand.Float64() * h
+		x3 := rand.Float64() * h
+		ctx.DrawLine(x0, 0, h, x1)
+		ctx.DrawLine(0, x2, x3, h)
+		r := rand.Intn(256)
+		g := rand.Intn(256)
+		b := rand.Intn(256)
+		ctx.SetRGB255(r, g, b)
+		lw := float64(rand.Float32() * 4.0)
+		if lw == 0 {
+			lw = 0.1
+		}
+		ctx.SetLineWidth(lw)
 		ctx.Stroke()
 	}
 
 	c.Image = ctx.Image()
-
 	return &c.Image
 }