Click "Choose Excel File" button to upload an Excel file (.xlsx, .xls)
Select the Sheet containing data
Select X-axis (horizontal) data column (time column, supports date/time formats)
Select Y-axis (vertical) data column (multiple selection allowed, Y-axis values will be automatically converted to numeric, null will be displayed if conversion fails)
Click "Generate Chart" button; X-axis will display the original table time format (uniformly used as text axis, avoiding date library dependency)
Set playback speed and total duration
Use animation control buttons to control point animation