From fea3b32c1f3e365e41f368957d06c70df8b3a89a Mon Sep 17 00:00:00 2001
From: David Doty <doty@ucdavis.edu>
Date: Sun, 4 Dec 2022 08:40:11 -0800
Subject: [PATCH] added example with domain colors

---
 examples/domain_colors.py                | 32 ++++++++++++++++++++++++
 examples/output_designs/domain_colors.sc | 24 ++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 examples/domain_colors.py
 create mode 100644 examples/output_designs/domain_colors.sc

diff --git a/examples/domain_colors.py b/examples/domain_colors.py
new file mode 100644
index 00000000..1e8ed5e6
--- /dev/null
+++ b/examples/domain_colors.py
@@ -0,0 +1,32 @@
+import scadnano as sc
+
+
+def create_design() -> sc.Design:
+    helices = [sc.Helix(max_offset=100) for _ in range(4)]
+    design = sc.Design(helices=helices, grid=sc.square)
+
+    red = sc.Color(255, 0, 0)
+    dark_red = sc.Color(150, 0, 0)
+    green = sc.Color(0, 255, 0)
+    dark_green = sc.Color(0, 150, 0)
+    blue = sc.Color(0, 0, 255)
+    dark_blue = sc.Color(0, 0, 150)
+    black = sc.Color(0, 0, 0)
+
+    design.draw_strand(0, 0) \
+        .extension_5p(num_bases=5).with_domain_color(red) \
+        .move(8).with_domain_color(green) \
+        .loopout(1, 5).with_domain_color(dark_blue) \
+        .move(-8).with_domain_color(dark_red) \
+        .cross(2) \
+        .move(8).with_domain_color(dark_green) \
+        .cross(3) \
+        .move(-8) \
+        .extension_3p(num_bases=5).with_domain_color(black) \
+        .with_color(blue)
+
+    return design
+
+if __name__ == '__main__':
+    d = create_design()
+    d.write_scadnano_file(directory='output_designs')
diff --git a/examples/output_designs/domain_colors.sc b/examples/output_designs/domain_colors.sc
new file mode 100644
index 00000000..bb4cff75
--- /dev/null
+++ b/examples/output_designs/domain_colors.sc
@@ -0,0 +1,24 @@
+{
+  "version": "0.17.7",
+  "grid": "square",
+  "helices": [
+    {"max_offset": 100, "grid_position": [0, 0]},
+    {"max_offset": 100, "grid_position": [0, 1]},
+    {"max_offset": 100, "grid_position": [0, 2]},
+    {"max_offset": 100, "grid_position": [0, 3]}
+  ],
+  "strands": [
+    {
+      "color": "#0000ff",
+      "domains": [
+        {"extension_num_bases": 5, "color": "#ff0000"},
+        {"helix": 0, "forward": true, "start": 0, "end": 8, "color": "#00ff00"},
+        {"loopout": 5, "color": "#000096"},
+        {"helix": 1, "forward": false, "start": 0, "end": 8, "color": "#960000"},
+        {"helix": 2, "forward": true, "start": 0, "end": 8, "color": "#009600"},
+        {"helix": 3, "forward": false, "start": 0, "end": 8},
+        {"extension_num_bases": 5, "color": "#000000"}
+      ]
+    }
+  ]
+}
\ No newline at end of file