1 files changed, 43 insertions, 0 deletions
diff --git a/src/field/fldeff_poison.c b/src/field/fldeff_poison.c
new file mode 100644
index 000000000..b751ee564
--- /dev/null
+++ b/src/field/fldeff_poison.c
@@ -0,0 +1,43 @@
+#include "global.h"
+#include "task.h"
+#include "songs.h"
+#include "sound.h"
+
+static void Task_FieldPoisonEffect(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+
+    switch (data[0])
+    {
+    case 0:
+        data[1] += 2;
+        if (data[1] > 8)
+        {
+            data[0]++;
+        }
+        break;
+    case 1:
+        data[1] -= 2;
+        if (data[1] == 0)
+        {
+            data[0]++;
+        }
+        break;
+    case 2:
+        DestroyTask(taskId);
+        return;
+    }
+
+    REG_MOSAIC = (data[1] << 4) | data[1];
+}
+
+void DoFieldPoisonEffect()
+{
+    PlaySE(SE_DOKU);
+    CreateTask(Task_FieldPoisonEffect, 80);
+}
+
+bool8 FieldPoisonEffectIsRunning(void)
+{
+    return FuncIsActiveTask(Task_FieldPoisonEffect);
+}