1 files changed, 28 insertions, 0 deletions
diff --git a/src/background.s b/src/background.s
new file mode 100644
index 0000000..5a9c5fe
--- /dev/null
+++ b/src/background.s
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+.segment "CODE"
+
+.scope Background
+    ;; Screen coordinates on the Y axis for the ground.
+    GROUND_Y_COORD = $C8
+
+    ;; To make them easier to traverse when performing background collision
+    ;; checking, each platform is laid out in tile coordinates and spanning
+    ;; three bytes: tile row, tile column beginning, tile column end.
+    platforms:
+        ;; Top of the screen.
+        .byte $03, $00, $FF
+
+        ;; Left platform.
+        .byte $09, $18, $1D
+
+        ;; Center platform.
+        .byte $0C, $03, $08
+
+        ;; Right platform.
+        .byte $0F, $0F, $12
+
+        ;; Ground.
+        .byte $19, $00, $FF
+
+        ;; End of the list.
+        .byte $FF
+.endscope